Suzuki RMX 250 Blows Up 5 Hours After Rebuilding It?
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- เผยแพร่เมื่อ 27 ก.ย. 2022
- This 1996 Suzuki RMX 250 dirt bike won't start back up after rebuilding it five hours ago. #Suzuki, #Fail, #Fix,
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I have a lot of trouble with my bike at the moment and these videos are helping me trouble shoot it. Thank you so much!
I had a 92 RMX. Super fun. Got it not running in great shape, cleaned carb an tank, new petcock, rear shock rebuild, oil change, fresh gas and started right up. Rode for a summer then did the top end and sold it.
Those were detuned from a regular rm250 from what I remember every year they were in production. I remember you could use a rm250 head gasket from earlier years cause the rmx one was extra thick to lower compression
Wossner makes a piston PN8022D050: Bore size: 67.50, Piston size: 67.44. Other companies offer the same. You don't have to have it bored out, you need the correct tools to measure a cylinder, it shows you how to measure in the service manual. This machine needs a new power valve (cleaned) seal kit installed, there's too much fuel/oil mix leaking into the chamber.
Pops
I re measured and it was bored out to a 67.5mm. We are just going to hone the cylinder and install the correct size piston. The powervalves will be gone through and cleaned. Where would you get a seal kit for the powervalves?
@@2vintage Get rid of those 2 piece RMX powervalves they break easily and have a limiter that keeps them from opening fully. Which is partially why the bike feels very underpowered besides the bad compression. RM250 powervalves from 89 to I believe 92 will bolt right into that cylinder. My '90 RMX250 has '91 RM250 powervalves in it and the powerband really fuckin hits! They are only 1 piece not counting the guide.
Yay another bike video 🤟keep up the awesome work!
I have a 92 RMX250 and replaced the carb with an Airstryker by Keihin. Bike is always hard to start but runs great.
Have you tried without gas but only choke then when you kick quickly twist the throttle? I never twist the throttle beforehand like some people do. My Yamaha DT125 doesnt like ANY throttle for some reason, only choke :) Same for my yx160 pitbike although its a 4-joke
If it is always hard to start it may be the pilot jet is to big.
Joe, do yourself a favor, get some micrometers & a bore gauge. You'll never get an accurate measurement on a piston or in a cylinder with a vernier caliper or dial caliper.
When someone tells you they honed out a scratch on a bike with an electroplated cylinder you know right away they don't know what they are doing.
And the Rmx 250 has one? Don't only, newer, four strokes have them?
@@baisleyde you don't have a clue what you're talking about the cylinder can be aluminum with a cast iron sleeve. There is no dirt bikes with cast iron cylinders aluminum or magnesium.
@@baisleyde I've seen some really smart people do things they know they shouldn't because they couldn't afford to or didn't have access to tooling etc to do things properly. Bit of a naive statement. 🙄
If he did Hone the cylinder out with nicacil or electroplated cylinder then it would more then likely take the coating off and the bike wouldn't run very good at all I'm thinking it was a sleeved cylinder but maybe not
@@RiderJon-offical no… majority of water cooled cylinders are nikasil plated (electro plated) it’s a very tough finish. Majority of air cooled bikes have normal sleeves that can be bored multiple times where as a electro plated cylinder cannot be bored to a size up set of rings and pistons
Good job joe not a bad bike look forward too part 2 👍🔧🔧🔧👌
Awesome tutorial, thanks for sharing all this info! Nice to hear a proper accent as well. 😀
What do you mean by the powervalves hanging over? Thanks! Long awaited video!!😊😊😁
Love 2 smokers cant wait to hear this thing rip,have a few myself over here in NZ,any 2 stroke here is worth gold,prices out the roof,even a second hand 2 stroke 125cc to 250cc you will pay 4k min
I like the fact that you work on 2-strokes. So many younger guys don't like them, for a variety of reasons. Ignorance is bliss.
Dude that did "top end rebuild", tried yet failed.
New subscriber !! Quality channel but the adverts are mind numbing!! Keep up the quality work 👊🇬🇧
Be careful taking notes from this guy his videos are riddled with misinformation and are some of the worst maintenance/repair videos out there for anyone trying to learn a thing or two about these bikes! I AM NOT TRYING TO SPREAD HATE IM JUST HERE TO EDUCATE!
Where did you get parts for this at I have a 91 rmx that needs rebuilt, and a spark plug and I can’t find one anywhere
Wiseco pistons by the way are forged not cast and so need some extra warming up time to expand and settle.
had the same bike 92 mine was the crank seal. kept it running wierd
It kind of looked like the float was hanging halfway off before you removed the float bowl. And the float pin just fell out on its own. 17:44
Float pins on these are loose fitted most of the time
Love the content brother, keep it up.
Even though that carb is a knock off if jetted properly should still work .
Finally an RMX250
That dang bike sounds really good, I like that exhaust!
My 1990 Rm 250 runs amazing if you have a an air leak in the air intake they will wind up full throttle best thing to do is lay it on it’s side when that happens cdi box has a tip sensor
Keep it coming 💪 💯!!
I've rode Suzy Q's since I was a little kid. They can be temperamental at times. You gotta just give it a little lovin' now and then. 😂
Amazing video! 🙌🙌🙌
Is the transmission have long gears being a rmx
Great video as usual! Im still waiting for the next video on that old Honda 500 you bought a while back!
Yeah that's coming soon! I just rebuilt the engine.
@@2vintage Cant wait! =)
@@2vintage can you explain how checking the transmission oil tells you the bottom end is fine?
@@johncoleman2495 I’m guessing he was looking for metal shavings or like he said the water pump cover if it leaked. In the oil it would be milky so it would run like that
@@nrxz_paradox3054 still got nothing to do with the bottom end being ok
What mix you use? For that Suzuki is 32:1
Being a 00’ rm250 owner my worst nightmare especially with suzuki saying ✌🏽 but proper preparation the baby’s will perform properly consistently. Love my juicy girl
2001 rm125 owner
I got a 85 rm250 and she rips got it for 600 dollars in mint condition and it’s fast asl
Got a 92 rm250! Rm stands for really mean 😂
Have you posted the update for this video yet. I want to see the first run and ride
There is a book by Eric Gore. He tells of all dirt bikes issues from 1985 on up.
I had that same bike ,I live in a small town and it was my daily transportation for 12 years.
i have a 1991 rmx250 im fully rebuilding right now have owned it for about 3 years i love the bike very fun and fast!
I got a 98rmx 250 I beat a 2022 raptor 700 in drag racing there fast as hell
Hell yea they are badass machines!
Oh man those bikes are Excellent, they came with full road reg here in Oz🇦🇺 except for the last 1 or 2 models & then Suzuki stopped making them.
I wish they started making them again & the KDX200/ 250 both were great enduro 2strokes & reliable.
U wish brother,that's when they really made bikes,now they just dnt make them!Great shame really!🤔🤨👁👀👁🙏🙏👌👊
Kdx200 is a kawasaki. Noob
allways measure bore up from the base where the least wear is an use bore gauges an piston put verniers the othe way 90 to the piston good job seeing tht movement in piston tht was funny when u did tht size of piston can be slight diff when cast or forged cast u can get tighter tollerances
And for the record, honing a scored cylinder is not "doing everything correctly"
Depends how scored it is. If you can take enough of the plating out without removing it completely its fine
@@MaNNeRz91 scored and scratched are 2 different things for starters. I don't know if you've seen this clown use a hone, but not one thing about it is correct. Nevermind all the other steps required in a top end rebuild. And he has no clue what any of them are! Nevermind how to actually execute them.
Again I'd say it depends. My old suzuki katana 50 had a nasty score in the cylinder wall. A score not a scratch. Deep enough to catch a fingernail in no problem. I managed to polish it out with a drill and a home made hone tool. The plating was unbelievably thick on that cylinder. The stock rings had way too much gap afterwards so I had to find oversized ones. it ran the best it ever had for a solid 2k more miles (I beat the shit out of it daily) and it cost me sod all to fix really. The scooter only cost me £200 to begin with.
@@MaNNeRz91 again....I'd say....doesn't mean doing things right
@@johncoleman2495 why would you do things beyond that on a cheap beater bike? If you can squeeze more miles out of a worn engine with little to no money spent.. that's doing it right bud
whay not tray with teaspon of gasoline in spark plug hole,before removing carb? !
They may not be seated yet, I'm thinking. Could've damaged ring putting back together?? Good luck, enjoying vid!!
WHY DO YOU KEEP FLICKING THE THROTTLE EVERYTIME YOU KICK A BIKE ?
good luck finding the power valve for this bike buddy had to make his own
Looks like either it has been bored and they didn’t know or the “scratch” they honed out was pretty deep and now the stock piston is too small. Definitely check the cylinder to see if it’s out of round.
Did you hear the Piston slap too ? 😊 That's why I don't like buying used bikes from someone doesn't know how to work on them .
"doesn't look like there is any damage really, nothing i can get my fingernail on"- shows cylinder beat to shit with scratches scuffs and missing plating
No end to the butchering of these bikes. Good to see you saving them from the grave.
White cable ties would be a lot better for checking your oil level i would think.
i think he's got some invisible one's that are attached from his boot to his wrist 😆
The goal is to see if theres coolant in the oil... theres a bolt on the engine to check oil level
Ignition side crankshaft seal sucking air ? not clutch side as plug would be wet with gearbox oil
Once again, these keihien carbs have a gasket under the jets, jet-block gasket, these fail and do not atomize the gas/oil properly! Causing erratic engine behavior.. just a tip Joe 😉 the issue here was obviously owner expert engine re-building.. 😖
Can you please stop using pliers backwards?
I'm sure the Suzuki has a Nicosil / Chrome liner unless its had a different liner fitted?
You you mentioned the power valve adjustment might be wrong. You really have to make sure that the power valves are not hanging down into the exhaust Port so that they make contact with a piston and rings. There will be an adjustment specification and the brake manual. And you need to follow what they say in that procedure. Otherwise if the piston and rings hit a power valve it's going to be ugly. More than that performance of the engine will suffer if the power valve is not adjusted properly.
Hi joe love your content I’m a uk subscriber have you ever done a Honda cub 90 video would be interested to see you work on one
Thanks for watching🔝 🔝massage me right away I have something for you⬆️⬆️
I had a 1995 so fun in the woods in Northern Washington
with a bit of money into it will be a nice bike great video
If you see my comment look up the TH-camr Navy Seabee. He made a video on a 1996 RMX250 he got running perfectly with the stock Keihin PJ carb by swapping the RMX cylinder with an early 90s RM250 cylinder. You might want to ask him for more advise. Also Ive owned a 1990 RMX250 for a few years now I've fully rebuilt so I can also answer questions you might have :)
I bet he did not hone, I bet he home bored it, a quick hone breaks the glazing to created cross hatch, honing for an hour to try to remove scratches is uneven boring. I am unsure if Suzuki used chrome cylinders in 96, he may have took the chrome off, this cylinder may have to be sleeved, I don't believe a chromed cylinder can be bored, the metal under may be too soft, but I don't know that for sure. Cool vid..
Clean up power valve good, could be sticking up too.
Good troubleshooting!
Hope one day you will get a first gen Grizzly 600 atv in for some work ....mainly on top end and also some hop up goodies.I have a 99 that is still in great cond. The top end is so noisey that sometimes it sounds like something could be loose.The guys at Yamaha said all those engines had a noisey top ends.But anyway i finally found a winch mount for the front.....now which winch would be a good choice that will also lift the plow.Love your channel and keep up the great work.....thanks.
airboot cracks as well?
Another case solved! Elementary, my dear Watson!
Hi, I'm from Brazil and I have a 1997 rmx. I need to know if the plastics are the same as the 1991 rm 250, if they are compatible? Can someone help me?
No they are not the same, you will have to go with the 89 rm to match it
I’ve got a 99 rmx 250, absolute weapons of bikes
You should get a yz426 or a wr426 for a video 🤙🏻
The difference from the Rm race bike the stators are not the same stock stator for the RM will not run a head butlight😊 no more gas you give it the brighter the head light
If I'm not mistaken, that cylinder also needs to be replated as well unless a steel sleeve has been put in. Could have been they just ordered the wrong piston for the rebuild it was pretty sloppy.
If its oem cylinder it absolutely needs to be replated or sleeved. If its sleeved should be good to go, but I have a feeling thats what the issue is.
He could just hone it out and get a .25 over piston they sell them oem
it has to be re nikasil plated puting a normal sleeve in won't last very long
@@linkinpiatak6669 you can’t hone the newer ones out.
i also had a rmx 250 but mine had power valve problems never ran proprely so i sent it in and the bike shop couldnt fix it so just ended up selling it after spending alot of money to try have it fixed
I had a blue and white euro spec 1995 RMX250 here in New Zealand road reg went well till the power valve got sucked into the piston and destroyed the whole motor,so i threw in a RM125 motor in it and sold it for good bank
would be nice street legal around town bike with slicks and different gearing
Wiesco pistons are for racing and I don't use them unless I have too , I use oem or pro-x pistons
I've had good look with wiesco in my 4 strokes but regardless what you put in a 2 stroke it's gonna blow eventually so I don't think that matters a whole lot mostly just all about how you ride and what your fuel mix ratio is
Wiseco makes a quality piston but I agree a cast piston is a better choice in some applications.
ProX all day 👌🏾
@@_WatsoBrii94_ pro X pistons are made in China now
Hey 2vintage/joe do you think you could rebuild my bike for me in one of your videos? its a 1986 yamaha tt225
Joe, I have 1989 Suzuki Rm 250 that was just rebuilt. It lacks power especially compared to my 1982 Suzuki RM 250.
Maybe the power valves are not opening up completely. The mechanic that rebuilt it said the carb might be gummed up ( I am thinking the Reed valves).
How about exaust valve
@@jessefinneman7680 on a 2 stroke???
@@aarongrabowski3775 Yes in exaust port is valve which adjust exaust port
@@aarongrabowski3775 th-cam.com/video/EABdo9VLj6I/w-d-xo.html
I love the floor in your garage. Makes me feel like I'm at 5 Guys.
Thanks for watching🔝 🔝massage me right away I have something for you⬆️
Too many people take short cuts on rebuilds!
Most younger ones DO NOT understand two stroke expansion chamber exhaust systems!!!!
A lot of people DO NOT understand how a good two stroke engine works, the world was too quick to condemn two strokes, basically 3 moving parts piston conrod crankshaft! 4 strokes have way MORE moving parts!!!!
There is a REAL SCIENCE making a GOOD pipe!!!! Means the difference between average power and REALLY GOOD POWER!!!!
This video was DeZaVu of twice a summer I was in good shape & primed to rip my 250 2Smoke on my private track! Then turned into problem solving for 2 hours before I just rode my kids 125 on my 1 day off a week 🤣1998 KX250. Fastest Bike That Never Runs!!!
The owner should be ashamed
22:40 might want to open the garage door! Lol
How can you say that the bottom end is good with out taking the cylinder off
Transmission
@@2vintage is that cylinder plated or sleeved if it's sleeved you may need to bore it to 67.50 I don't see any piston sizes between stock and 67.50
How is that possible? Pretty cut & dry.Maybe Rmx & RM slighty different & he used the wrong one?To have the wrong piston if it's a suzuki piston seems strange.Wrong year part? Slightly different bore? Idk, something doesn't add up here.
I have a 89 rmx250 it has 2 hours on the fresh rebuild. But since that top end it eats plugs
No run? Lol. Good job bro, but would have loved to see end result. If u do my bad.
Why do you use a caliper like that on the piston? That is not an accurate measurement. Anyway, as you say in the video, the piston and rings are way too small for that cylinder.
I allway did the crank rod and bearings. New cylinder and piston.
If he was running it at 32:1, it was fine. Probably a single ring piston, may not be drilled. It is a Suzuki.
Could be wrong size piston.. Maybe who ever rebuilt the top end bored it to get scratch out of the head, and didn't compasate the right size piston..
My RM 80 has a 210 main runs mint 170 sounds small for a 250
The bore didn't look bad. Maybe just step up to a 67.25mm and send it?
That's what was thinking
You shouldn't keep flammable liquid in a uncovered bucket in your garage like that...you already had a fire, that would definitely burn ur shit down quick..get a fire cabinet or keep it outside with a secure lid on it..
I have a 92 rmx 250 there a little heavier of a bike but there great!!
Is it me but dam 90s mx bikes had a sweet stance and that short compact look too modern ones look to long and lanky I'm a tall guy and like the feel of a smaller frame feel more in control and comfortable newer bike feels like I'm stretched too much out
This bike has nothing in common with a 96 RM250. The engine is a detuned version of the old case reed RM engine from the early 90's. They had lower compression (thicker head gasket), stock pipes were restricted, smaller carbs, and even had a throttle stop to prevent the slide from opening all the way. They had much softer suspension, a generator stator(for lights) iirc a few other small differences. Suzuki basically ignored this bike from right after it's introduction seldom updating it. And when they did it was never to the extent the RM was. They did accept many RM parts and woke up considerably when those changes were made. At one point Suzuki offered a kit with the bike.
I did mention your comment in a post I made here as to being spot on with all points you made about the RMX250, all very good. I have a '99 RMX125 in the stable and know exactly what you are referring to. Thumbs up from me.
Pops
Engine is 93-95
To help diagnose a Blown plug ?
Heat it before you put it in
If it has an issue the heat will just let it give its last performance
wrong piston size?
That is one of the greatest bikes ever made.
You could hear the piston slap when you fired it up. The cylinder is shot and needs replating. The carb was a joke. How that thing ran at all is a testament to the two-stroke .
You really need some instruments to accurately measure pistons and honed bores. But the ring gap and thee way that piston flopped around I would say someone was in there without proper tools and then tried a stock piston in a honed out bore.
word of advise on those old suzuki motors. Suzuki spec'd the wrong ( short i think) bolt for the primary gear. it has a bad habit of walking itself out and chewing up the case. when the gear wobbles off, it also will tear up the splines on the crank. Its a good idea to pop the side case, and check the condition of that bolt and the cup washer. sometimes they were installed upside down.
the gear should have holes, so its a pretty simple mod to drill a safety wire hole to secure the bolt for good.
Hes only doing a half ass patch up job and its obveous from the attempts to start it up he shown that he couldnt care less if he caused more damage than it already had ..
He mentioned it had a forged wiseco piston that will aways fail early in such japanese boost port two strokes ...plated cyclinders can never be repaired
.as your two stroke technician does not know much about what he thinks hes doing .but dumping more money into what was a good engine that is now being shade treed to death
@@donniebaker5984 just dont want to see another old zook engine die a horrible death. i had to learn the hard way about the primary gear.
watched his latest vid with the new piston, and cringed as he was drilling the ports. this shit should be illegal on youtube haha
@@crswro1690 so far the knowledge and skills shown here will eventually cause its permanent death and thats too bad ...the bottom and top end needs to be completely rebuild before you ever try to start up an old engine that is becoming unobtanium ...i see no checking of the run out on the crank .crank seals where not tested for pressure or vacuum ..the carb is not the original which there is a good chance that it can run too lean in the mid range ..and he says he will ride it so more to fined out ...if its too lean you will know in about 30 seconds riding it wfo ..he said he is sending the cylinder out to have bored out ..its a nikasil coated cylinder ...boring it out and its ruined ..there is no such thing as over sized pistons for the same reason ..
But for , $300 bucks the old cylinder can be totally restored to oem specs ..and is the only possible way if you are wanting your handy work to last longer that a week
@@donniebaker5984 as the proud owner and custodian of 1 96 CR250 engine, and 2 HRC Japan RC250 engines 96&01, watching him butcher these bikes hurts my soul to it's core...
I love your vids 2vintage keep up the good work 👍
Be careful taking notes from this guy his videos are riddled with misinformation and are some of the worst maintenance/repair videos out there for anyone trying to learn a thing or two about these bikes! NOT TRYING TO SPREAD HATE JUST FACTS!
did you adjust the valves!? cant believe this guy🤦🏻♂️… bring on the hate comments😂
also has a bigger tank and smaller back tire
wide ratio transmission also?
los pistones se miden con micrometro no con calibre
rmz or rmx?