How To: Kawasaki Ninja 250 Chain Adjustment
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- เผยแพร่เมื่อ 2 ต.ค. 2024
- www.DaveMossTuning.com
A Kawasaki Ninja 250 arrived for a school day at the track with a slack chain. Can't be too tight, can't be too loose. There's truth in that Goldilocks fairy tale, it needs to be just right. That's why god gave us adjusters. These on the Ninja 250 are typical for a modestly powered bike.
www.DaveMossTuning.com
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can you clarify why you use a screwdriver between the sprocket and chain when tightening the axle? thanks
That makes sure that the axle is pushed up tight against the adjusting screws so you tighten the axle perfectly straight. You can also use a rag etc to do the same thing.
Great watching an actual mechanic do it right. No just rushing it. Tedious but done right. Why it’s so nice finding a shop that does things you can trust are well done.
If you have watched other videos of Dave Moss Tuning you will see that he goes over everything very well. He did look like he was rushing so the rider could get back on the track. Could have been a hot day and we always forget some stuff every once in a while. So don't hate the video. Everything that he didn't mention has been answered in the comments.
That's it I'm subsribing! Short, simple, detailed and easy to understand! Keep up the good work Dave!
my kawasaki 250 chain always loosens, even when i tighten it. for one to two days its fine then it gets loose agian, and one day while i was riding it came off and it got strungled up in the front sproket and got broken, but thank i was driving slowly when that happend. so what am i doing wrong? is the two nuts on each side wrong to use?
What you are doing seems to be right but the chain is very small and stretches quickly especially if you ride the bike hard. Are you matching the chain tension I show in the video and if so, it should not come off the sprocket. ? If you are, then it is time to replace the chain as it keeps stretching.
How can you tell if the chain is too loose or too tight? Great video by the way!
Find the tight spot and see if you can just touch the plastic chain guide without moving the top of the chain upward. Check side yaw under the swing arm and see if you can pull the chain partly off the rear sprocket.
so how do you keep the wheel aligned when you have to re tighten the chain after you change out the front sprocket?
You measure with a precision device to make sure it is straight. Once correct, make a paint pen mark to know where your starting point is, then you simply count hex bolt faces faces as the chain is adjusted.
Don't use an 18 inch breaker bar or you'll over tighten the 22mm nut.
What size are both rear axle nuts
On my 2009 ninja 250R the left side nut is 15/16” socket
@@gp8721 thank you
You're very best teacher and u know about very deep knowledge in bike few people know about and they don't tell about everyone in free so u and ur work great.most superbiker don't know any knowledge 🙏🏻👌🏻👍
What tools are required for this job?
Sockets for the rear axle (17mm and 22mm I believe), 12mm wrench/spanner for the chain adjuster, rag or screwdriver to put between the chain and sprocket when tightening.
Once Again... Thanks!
I have a ninja 250r wanted to know if a 14 39 sprocket and a 520 chain would work fine
Depends on your track and lap times. 520 chain will work fine as will the 14 front. Rear sprocket choice is subjective as mentioned. Critical part is rear axle location.
Was there a crack in the rear swing arm back there???? Looks like a small weld job
Would be beneficial to mention wheel alignment here also
Good point........
Hi dave great video!... does it also pertain to my 03 - 250? I also have one more question theres piece of semi hard rubber that the top of my chain rests on and I've seen plenty of other vids of my style 250 ninja and I've never seen this rubber piece. Is this normal? I'm thinking the chain is loose ive put 430 miles on her since October and have had no issues with the chain so far other than it looking suspect lol
Hi Kirk. Yes it does - so just take a look but do not be too analytical. The part you are referring to is th chain guide. Every motorcycle has one on the top and bottom of the swingarm so the chain does not cut through the metal!
@@catalystreactionsbw awesome dave thank you for the quick and very helpful response!
Thanks!
Mudux, I believe that the only slicks that fit these rims are the Moto3 fitment. I have been curious how they affect geometry and Dave Moss may be the guy to tell us. :)
Geometry is affected by circumference, so you measure the old tires (inflated) and then the new tires (inflated) and see what the pitch difference is with the chassis:- nose forward, rear biased, general lift up, general lowering. That will guide you to the changes that need to be made.
what size is that castle nut?
I know for 2009 - 17 mm bolt head (left side of the bike), 24 mm castle nut (right side of bike). Torqued to 72 ft lbs, New cotter pin as needed.
May I know why he put screwdriver between the sprocket and chain when tighten up the tyres?
The screwdriver or rag forces the axle blocks against the adjusters so the axle is tightened straight and there is no air gap between blocks and adjusters.
@@catalystreactionsbw Thank you very much sir
Is there any cons of having a too tight chain and a too loose chain?
Too tight and you stress the case bearing on the output shaft. That can require new cases as the bearing ovals them out. To loose and on downshift the tsunami in the chain causes it to come off.
I can't find the same model as mine anywhere 😑
So you guys dont use tensioner gauges to check tension???
I do not as chains stretch and wear unevenly, so I assess each chain as I work on it and listen to the way the rider describes their use of the motorcycle. I am also leveraging several decades of knowledge.
6years ago,what camera did you use sir?
Mr. Williams the videographer will reply. I cannot answer your question.
Dave Williams, editor, replying here. It was a Panasonic camcorder of some kind, about $900 at the time. I can't remember the model. I don't have it anymore. Bought it in January 2017.
Where’s your accent from?
Manchester in the UK. I left there in 1987.
What does he mean one face?
A square has four faces, a hexagon has six. You can count faces and add then up.
@@catalystreactionsbw thank you for the reply!!!!!!!!
What about the chain slack mentioned in manual?
You can do that measurement if you feel that is the right thing for you and your bike.
@@catalystreactionsbw Hi Dave, Thanks for answering my question, another thing I wondered that when the rider sits on the bike the slack is removed and the chain gets tight, so should the chain adjustment account for rider weight or something like that.
@@soliddiesel7 when the bike is loaded with you, you/passenger, there should be a small amount of free play present 5mm or so
Good job 👍👌👏💯
Thank you! Cheers!
Is it important to spin the tire to check in various areas of the chain when adjusting slack?
It is, so you can find the or more than 1 tight spot in the chain. You can also see when links are seized as the chain will "tighten" as it rolls around the sprocket.
Is that a 120/60 tire? What's the reasoning for using it?
There are various combinations between 120/140 to 110/120 and it depends on what the tire manufacturer provides.
Mudux
(tire size)
it a Ninja 250 so it doesn't take a large tire and it may be the size that is available in a slick for that bike.
correct - Dunlop ad Bridgestone offer slicks.
But the Original Size of the Ninja 250r is 130/70/17!! Wy Beeing that a Race Bike as a "Smaller" Tyre?!!!
Sorry My English, i'm Portuguese!!
I'm sure this guy is experienced but he didn't go over the proper way to check the bikes chain measurement and didn't go over the wheel alignment using the notches on the nut. Not very impressed by this guy. With many novice like myself here, this is the wrong way of doing a how to video. MC Garage is way better than this!
Thanks for your salient input. There are many videos on chain alignment and free play in this channel. We don't repeat ourselves in every video and perhaps there is a lesson here that we need to. Yes, I have experience that you can assess in other videos in this channel.
Then go back to mc garage. Pretty boy ari can hold your hand on how to clean your chain.