Aprilia RS 125 2 Stroke - 16 40 Sprocket Setup
ฝัง
- เผยแพร่เมื่อ 18 มี.ค. 2022
- Hi you're watching the Tom Did It channel.
In this video I downsize the front sprocket from a 17 tooth to a 16 tooth. This 16-40 sprocket setup will increase the acceleration and slightly decrease the top speed. Good for me as I live in Sydney City.
I highly recommend you try this cheap modification!
Enjoy. - ยานยนต์และพาหนะ
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Hello tom . Just simple advice for 2stroke lovers . After a month even a year our motorcycle doesnt been been start , we need to put a 1-2 2t cap to the piston so the piston doesnt have a friction because our piston is in dry + have vapour condition . Its also make our starter and combustion become more easier and the block and piston doesnt have any scratched . If want to do more before we leave it for a month even a year fill the gas full tank so our tank doesnt have any rust , fill the 2t oil in small amount so the pressure become lower and the 2t doesnt kept flowing on the engine , close the muffler hole to prevent dust and steam from entering the engine and causing the exhaust rusty and put the piston on the det end so our piston block is in free condition . It will make our bike become more long lastings
Hi Moon Moon.
All good storage advice, thank you.
I hope others see this.
Thanks again
Tom
I’m going to be 17 soon in the uk and have just bought myself an rs 125 and ur videos are amazing for helping me along doing various bits. Keep them coming please.
Hi Kalle.
Congratulations on buying yourself a great bike!
Im glad my videos are of some use to you. It’s messages like this that keep me making videos👍
I hope upload another video this weekend (all being well).
Cheers
Tom
Another great video Tom! Love the ride footage at the end. This bike has some get up and GO! 👍💪
She’s running well now mate!
Thanks for the comment.
and again, a quality video! Well done Tom
Cheers pal.
your videos give me confidence to get a 2 stroke! thanks mate
Greetings. Thank you for your comment!
There is nothing like a crisp running 2 stroke.
Enjoy!
I must say your videos are very professional considering the low subscriber count.
Thank you for the positive feed back SV!
Glad you like them.
The channel is in the early stages and I’m learning the editing side on the job😀.
Cheers pal,
Tom
@@tomdidit4216 he's trying to sell you subs check out the channel he's got
Hi there.
I didn’t realise!??
I’ll check out the channel soon.
@@trianedtog0417 nah
this bike pulls soo good, its fast
Cheers Kappa.
Wait and see the next mod lol!! 😀👍
Thanks for the comment.
Tom
I've just done the same on gearing the standard gearing felt really long haven't been out just yet but looking forward to it now
Hey mate, I went to a 15 tooth front as I’m 90kg. It’s a lot better off the mark and around the Eastern Suburbs of Sydney. I’m sure we will run into each other soon👌
Good to see you out on the bike Tom! i must admit i enjoy working on the bike more than riding particularly with the UKs weather at the moment lol I attempted to change my top-end yesterday but the mitaka cylinder had a defect & dumped all the coolant in my exhaust and bottom end :-(
Feel bad for you man😢
@@Subliminal3117 Thanks mate, used a compressor and blown most of the coolant out the bottom now, just leaving a heater on it for a few hours, fingers crossed it ain't done no damage luckily didn't start it!
Hello again R&D.
I have to say, Sydney weather has been terrible. Around 2 years of rain in a month! That’s why I hadn’t started the bike in such a long time.
Glad to hear you liked the video.
On the other hand, your news is a real bummer! Drain the engine oil, and flush new through should help. Also good luck with the top end install mate👍
Regards
Tom
@Paul Mickiewicz Morning, it was a brand new cylinder and had the defect from manufacturing, inside the cylinder just above the PV port is a massive hole, coolant leaked straight through this into the exhaust and bottom end :-( i'll upload a video to my youtube account later
@@tomdidit4216 Thanks Tom, i've drained all fluids but annoyingly as it's in the middle of the crankcase it wouldn't drain through the holes, removing the engine and turning upside down was an option however an hour of my air compressor did the trick eventually, couldn't move the piston it was so hydro locked :-( Bummer to hear of the bad weather in Sydney, hopefully you've got all the rain out the way now and can enjoy driving again ;-)
U need a group of rs125 to learn more about this bike . I think we need to do a lot of improvement to the engine . Im scare the sound of engine , it seems need to do a lot of repair and adjustment such as pilot jet , mainjet and air flow of the carburator
Hi moon moon.
Are you referring to my bike or your bike?
15 min no traffic keep it open 😊
Well done, Tom. I have a Krr 150 2t from Kawasaki. Sounds similar like yours 👍🏻 I always wonder about the speed limit in Australia which is shame you can’t enjoy the full potential of the bike. Here where i live everyone is changing the sprocket setup for top speed 😅 It’s mind blowing sometime to think small engine like this can run up to 170+kmh. Anyway, thanks for the video!
Cheers.
Hello lil pac. Thanks for your comment.
I believe the KRR bike is rare in Australia. That extra 25cc can make a real difference over the total RPM range👍.
There are areas outside of the city where I can open her up, however I chose the current sprocket setup to suit my day-to-day riding.
I agree with you - 170+kmh is great performance for such a small engine!
Long live the 2 stroke😎👍
Thanks again pal,
Tom
Thanks for your videos, it helped me a lot, I recently bought a 2001 rs125, with the intention of registering it, but once I got it, I decided to use it as a track bike, it’s slow compared to the other bikes (mostly 400cc and bigger), but it’s a great track bike for me(I’m 55j.
The RS125 is a great platform to start.
Thanks for your message
Tom
Hard too start 😮
The thing is with these little bikes as I own three rs125s all SP models from factory full powers one being a all out race bike one being a road / track bike and one being a collectors bike is that my 41hp set up on my road/ track bike is very fun and also suprisingly reliable as long as you have the correct jetting on the bigger carbs mine has the 39mm carb they’re fine, 17/40 gearing top speed of 114mph but it does cost a pretty dollar to tune this far , vforce reeds and vhm cylinder heads make a massive improvement on these bikes obviously you’re riding it daily so you wouldn’t want it to be competitive with a 600cc bike but if you want more all round power the vforce 3 reeds give a massive improvement in low end mid range and top end including responsiveness a vforce 3 reed kit for these bikes around around 130 pounds so about 160-170 dollars but will give you 3-4 horsepower on the dyno too
Thanks for the detailed comment.
You must know these bikes inside out!
I’m looking into the V force option, however I hear that the carbon petals hit the engine. A Reed blocker is needed. Your thoughts?
I agree, these little engines respond very to tuning, at a cost 😀
Thanks again
Tom
@@tomdidit4216 I run the vforce reeds in all 3 of my bikes including my road bike I have done 7500 miles of my road/track bike with them and I can confirm they do not hit anything or need a spacer they also eliminate the possibility of the screws of the stock reed valve from entering the engine
The v force 4r reeds can be fitted which have the petal stop you’re talking about but on the dyno it gives a more unnatural curve and has more midrange
Other ways you could gain more pulling power is through a vhm or italkit cylinder head, actually improves the bikes cooling and will run more crisp as the stock squish clearance is quite large even with the smallest cylinder base gasket on , they’re not too prices but gives power through all the rev range without harming the engine
Thanks for the info mate.
I’ll have a look at the V force 4 reeds on the weekend. I’m currently running the original reed block. It’s always in my mind that one of the small reed screws will come loose and fly into the engine!
Hello mate. Good videos. I might try this modification on my mx 125 supermoto. Do you have them there? Same engine. Why don't you get yourself a rs 250. Too much fun
Hi William
Thanks for watching and commenting👍
I think the MX does share the rotax engine. You better check to see if it is the 123 or 122 model.
I hope that I’ll own a 250 one day mate. Better start saving my pennies!😀
Cheers
Tom
Hi Tom.
Does your bike have the EFI ECU?
If so is it drilled?
It seems like my bike does not gain that huge boost when the power valve is supposed to open.
The bike seems to be vibrate a lot more at 8k or above, but that might be normal. Yesterday was my first time applying full throttle.
If you would not mind, check my latest video and look in the comment section, there I've put some time intervals where the "noise" appears when approaching 8k.
Hi Phillip.
Yes my bike does have an ecu.
There is a long list of reasons why your bike may seem sluggish in the power band. I believe the Aprilia RS was shipped around world with different restrictions. These include ecu power valve and exhaust restrictions.
Sorry I can’t help further mate.
Hey tom i wanted to know if changing to a 15 t sprocket would need some Extra stuff to do or if its the same process. Thanks in advance and post more of the aprilia pleaseee😊
Its the same process, you just need to set the rear wheel a little bit more to the back
Top speed on stock aprilia rs 125 2010?
Hi tom, just wanted to ask what was the max speed before and after the sproket change, did it go down more then 10kmh
Hi Valdas.
I thank you for your comment.
To be honest I’m not really sure of the top speed before and after. I’ve never had the opportunity to top the bike.
If I had to guess, I’d say the top speed is now reduced and 10-15kms?
Thanks again,
Tom
While you were changing the sprocket, there’s a little plastic clip to the left on the frame with a zip tie through it. Do you know what it’s for? I’ve just bought my RS125 and I’m working through sorting some problems out and working out what’s missing and what’s been bodged!
Also there is a brass union connector on the crank case on the same side as the sprocket just to the right as you look at it, do you know what it’s meant to connect too? Mines open without anything attached but it looks like it should have a breather on it
Hi Ryan.
Congratulations on buying an RS. They are great bikes.
The description is good however to be honest I’m not sure what you mean. I’ll do my best to take a look at my bike over the weekend and get back to you👍
Cheers
Tom
Hey Tom I am 21 years old and I will be 22 in March next year when I hope to do my CBT to get my hands on my first bike - I have made a firm decision on the Aprillira rs125 2 stroke - I love it and think it’s a beautiful bike - love the power and speed of it to. What do you think of my decision any type of advice for me please ? I would really appreciate it :)
It’s a good bike if you can find a very well maintained one and you are willing to put in the love it needs. They’re beautiful bikes when they run well but a pain in the ass when they don’t.
Hi Tom , I currently hv the same bike . Is this gearing suits the standard 28mm carb?
Hi
Yes it would suit any carb setup. Just gives a little more acceleration and easier pull off the line.
hello Tom i have 125 rs 1999 arrow exhaust 34 vhsb jet 155 and 40 vforce italkit rave valve original locked upside sprocket 16-40 11500rpm max vmax 150kmh gpsi m 90kg i think 17-42 will be the best i will test it soon
Hi there. The setup sound awesome. I also like the 1999 bikes.
My upcoming video is the 34mm install 😀
See how it goes👍👍
Cheers
I like this bike. Can this change to the rs4 look the 3 headlight? Is that can fix? Because I like this performance but I like the rs4 looks
Hi Tan
As noted earlier, I’m not sure if the RS4 was a complete redesign? So not sure if the components are backwards compatible? Sorry I can’t help with this. Possibly there is some information online?
I don't know If mine is actually 16-40 then because I'm 105kg and mine goes nicely of the line and has 155 km/h top speed 👍, beautiful RS by the way 🔥
Hi Juha. Thank you for your comment.
Not sure of what your gearing might be, regardless, it sounds like your bike is well tuned👍
What year of bike do you have?
Cheers
Tom
Holy shit you’re a fucking tank bro 💀
what spark plug are you using ? surely not a br10 as you don't seem to be in the high rpms much
Hello there.
I’m running a BR8 spark plug as it seems to suit my riding and jetting. I understand the BR10 is good for racing as it is cooler burning?
Thanks for your comment.
Tom
@@tomdidit4216 yeah the br10 is best suited for the 38mm carb upgrade and pretty aggressive riding, I was using it here in the UK but found it was fouling often as I do short distances and not up there in the rpms all the time, I'm using a br9 which works perfect but going to try the 10 again come summer
Your describing the problem I experienced with the BR10👍
The 8 suits my city riding and quick bursts😀
Just out of curiosity, what 2T oil do you use?
Nice bike!
My RS with stock gearing goes at max 155 kmph with me weighing at about 70kgs, it would go faster because it has around 2k rpm more to use but there is like no power in 6th gear even if i'm 100% throttle it just keeps the rpm steady, any ideas on what it might be? The bike is slightly modified with some performance parts such as a gianelli full exhaust system and an italkit 125cc aluminium kit, the rest is pretty much stock
What carb?
Maybe not enough power to push the bike for the ekstra 2k rpm?
Maybe time to fiddle with the rear sprocket😢
@@Subliminal3117 dellorto 28 vhst
@@Subliminal3117 i mean the most power is at about 10k rpm and that's when it doesnt wanna go
@@doublecomm4185 have you replaced the ecu with a tuned one? And if you really want nice power you want to replace the carburetor for a bigger one
Hello my dear how are you I think are you good everything I will see your video Dena I am come Bangladesh and lottery bike timing in Bangladesh aprilia only I will buy one FX 150 so I think good bike because I was right this bike aprilia there are also everything good then my opinion bike manufacturer very good this site
Greetings from Sydney, Australia Amar.
Glad you like the video👍
Cheers
Tom
Is it true that these are rotax engines similar to those in racing go karts?
Hi Aaron.
Yes I believe so, however the gear box, clutch and exhaust shape would probably be modified to suit.
Cheers
Can you set chain swag with the wheel lifted?
Hi there. Thanks for your comment.
My bike was on a paddock stand so the weight was resting on the back swing arm. I’ve always found it ok to adjust the chain like this.
Hi Tom just wondering how tall you are as I'm looking at the same bike
Thanks
About 6ft
85kg
The bike pulls me ok.
@@tomdidit4216 thanks Tom I'm probably pushing it at 6ft 5 lol
Salut! J'avais du 16/39 puis 17/39 et 16/40.
Je trouve 16/40 très court mais une très bonne accélération jusqu'à 140kmh
Hi
I really like the 16/40 as it suits inner city.
Acceleration is great 👍
Thanks for your comment
17 40 jesus that's tall..a drilled"lightend" front and 420 chain whith aircraft aluminium 36tooth on rear and a softer spring on the waste gate pv....have you ever heard of the Wurzels.....
Try lectron or smart carburator 😁
It could be one of the next upgrades??😀
Hi Tom. I have a few questions for you about the rs 125. I have the same bike as you (deristricted) and i can't figure out why my top speed is only 115km/h. Can you message me or give me your email to just have a few words? Edit. finally got a good pressure tester and it turned out to be poor compresion, only 8 bar, where as far as i know a good engine should have about 10 bar. So yea, mystery solved.
it isnt derestricted if it only does 115km/h
I'd actually like to hear about this, Bought an 08 model last week and has the same issue although I couldn't get it passed 100km/h on the highway ride back, She has the ECU Done and also a new exhaust! and also, if tom wouldn't mid, I have a lot of open pipes on mine from the carb and also a pipe that plugs in the bottom, what pipe plugs into the bottom of the carb!
@Paul Mickiewicz it's the 28mm Delotto, vbsh28nif I remember correctly, just giving the bike a once over as she needed adjusting, back down to sea level now
Agreed. Thanks Paul.
There are many variables as to why the bike is under performing👍
@Paul Mickiewicz Hey Paul, I am In South Africa, I will check all of those, I haven't checked the PSI nor the hearing set up yet but I will do today but I do know there is a power cable and it's working, I have had a look and I can see the hope drilled into the CDI under the set.
The bike shouldn't be that hard to fire up . Should start instantly off the button
Hi Josh
Thanks for watching the video!
My bike often stands for long periods of time. This sometimes causes it to start slowly.
If I ride it more than once every two months it starts within a second👍
Cheers
Tom