Jump to content

Bike issues


James Banks
 Share

Recommended Posts

Earlier today i slipped on a wet manhole cover. The bike (honda cbr 125) landed on it's left side, my leg caught some of the impact but when trying to get it home i noticed it wouldn't shift down gears. Only up. The gear pedal hits the side stand. I had to hold in the clutch and get high revs to get it to move anywhere. It felt as if the clutch wasn't releasing properly when i let it go completely. Anyone have any idea on how much of a job it would be to repair and how much it would possibly cost?

Any advice appreciated. Thanks alot. James.

Link to comment
Share on other sites

Got the gear peddle back in place, that's working fine now. The mechanic fiddled with the clutch and now that's working better than it was before but at high rpm's (starts at about 6k) it feels as though i'm holding the clutch down. The revs go ridiculously high very fast without delivering much power to the bike. It's fine as long as i stick to low rpm's but that restricts my top speed on a 125 :/

Link to comment
Share on other sites

Got the gear peddle back in place, that's working fine now. The mechanic fiddled with the clutch and now that's working better than it was before but at high rpm's (starts at about 6k) it feels as though i'm holding the clutch down. The revs go ridiculously high very fast without delivering much power to the bike. It's fine as long as i stick to low rpm's but that restricts my top speed on a 125 :/

 

The mechanic needs another fiddle with the clutch, he's adjusted it so it's slipping. And get it done sooner rather than later before you burn the clutch out.

Link to comment
Share on other sites

I think that you're right, i definitely smell burning clutch when at high rpm. I just hope it's just that adjustments need to be made rather than something that wrong internally with the clutch as a result of the bike hitting the ground. Could turn out expensive if so :(

Link to comment
Share on other sites

Right, first thing tomorrow i'm taking it back down. Is there any way to tell if it's an easy fix or something wrong with the clutch itself? There's no burning smell or problems at low rpm's. Think it's damaging the bike then?

Link to comment
Share on other sites

Clutch normally runs in a bath of oil and you can't smell it burning. Slip it enough and you will warp the steel plates and wear away the friction plates. Probably an easy fix for a half decent mechanic?

Link to comment
Share on other sites

I asked a mechanic, (not the usual one) and he said if it's slipping then the clutch is going and i need a new one. He said that the tuning on the clutch makes no difference if it's slipping and he wont have time to replace the clutch until after the weekend. I'm meant to be doing about a 200 mile drive tomorrow :(. I really need to try to get it fixed tonight. I hope it isn't the clutch, maybe if i stay at low rev's tomorrow the bike will survive the journey (although it will be even longer) and get it repaired on the other end.

Link to comment
Share on other sites

Clutch slip can be down to a few things.. No necasserily always down to the Friction pads being low..

Generally, if the springs are good, then lower clutch material shouldnt affect it too much, as the tension on the springs push the friction plates in, So should still make good contact..


I recently replaced my clutch because the friction pads were low, it slipped if i burried the throttle in a high gear and low revs, or if i hit a harsh bump in the road. But was fine normally..


Like i said, clutch slip can be a few things..

Low friction plate material

weak clutch springs

incorrect engine oil

poorly adjusted clutch lever (most engines have a nut inside the crank casing directly behind the clutch lever to the engine, although, some honda engines dont have this)..

Poorly adjusted clutch cable..


Generally speaking, you want your clutch cable tightened so that when the clutch lever is fully out, there is around 1 - 2cm of clutch lever free play before the clutch starts to dissenguage..

This is in the Honda engine manual...

and the biting point of the clutch should be half way between the lever travel..

If the biting point is right at the end of the clutch release travel, ie: right at the top.. you may want to adjust the cable, so that there is 1-2cm of free-play before the clutch starts acting on a pull...


ID check the smallest things first, before cracking the crank casing open and doing the more advanced stuff...


Hope thi shelped


:cheers:

Link to comment
Share on other sites

  • 1 month later...

A month or so later and i've had the levers and cable sorted so it's definitely not them. Alignment was out on the clutch lever which was causing some unwanted tension. Now as i slow down (say in second gear) by just using the throttle a horrible grinding sound comes from the engine. I'm gonna guess that this is the clutch slipping as it tries to transfer the change (decrease) in power from the engine to the wheels. I thought it could either be that or a chain issue. May just need a new clutch. If i had the tools and some space i'd change the clutch plates myself as i'd save around £100 doing it and there any many videos on how to do it. Any suggestions guys? Thanks alot. James.

Link to comment
Share on other sites

changing the clutch is a very easy job but also change the oil and use fresh oil at the same time as the old oil will be full of clutch particles.you need a set of friction plates and steel plates clutch case gasket and oil.if unsure take pics as you take it apart but it is a very easy job to do on that bike

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Welcome to The Motorbike Forum.

    Sign in or register an account to join in.

×
×
  • Create New...

Important Information

Terms of Use Privacy Policy Guidelines We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.

Please Sign In or Sign Up