Clutch

Ace Rossi · Posted: Sun Sep 30, 2012 6:23 am Post subject: Clutch

Are there any tricks or tips to eliminate a cr125 clutch from grabbing so abruptly? The way mine is you have to have the rpms so high or you will stall the engine. I've heard you can file down the slots or fingers on the basket where the plates ride but not sure if this is the right thing or not! Ive tried all the adjustments etc., and no help!
Thanks

Steve Buckner · Joined: 22 Apr 2003 Posts: 839

Could be warped clutch plate. Check clutch plate warpage on surface plate or glass using feeler gauge. Service limit 0.008 in.

Disc thickness should be 0.112 in.

Also check the clutch lifter for wear and the rod for warpage.

Look at the clutch center, (where the plates slide over) and the outer,( where the clutch disc slide over) for nicks, indentations, abnormal wear.

Also, is this a problem when hot or after a few laps. What oil are you using.

Ace Rossi · Posted: Sun Sep 30, 2012 10:30 am Post subject:

Doesn't matter, hot or cold. The oil was recommended by Jason from Swedetech which was Motul

Randy Mckee · Posted: Sun Sep 30, 2012 10:59 am Post subject:

I'm not sure if it was you or not.... did you install that motor-cycle clutch lever on your shift knob? If so, perhaps it doesn't provide enough feel to get a good launch. Also, standing starts can be tricky. Even the best drivers bog the motor on occasion.

What rpm are you trying to get going? For a race start, you'll need to be around 11K or higher before you feed in the clutch. If you just mean leisurely leaving the pits, the rpm's don't need to be that high, but you'll need good feel to get going slowly.

Just throwing out some ideas....
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Randy
#123 TonyKart - S4 Stock Honda

Ace Rossi · Posted: Sun Sep 30, 2012 11:04 am Post subject:

Yes I did put the bike lever on BUT it did this with the regular handle too.
I know that leaving leisurely the motor will just stall every time so there's no leaving easy! Its high revving and almost a slip the clutch ( in and out constantly) to get it going without stalling. My friend said he had that same problem and something about filing the slots where the disc ride eliminated the problem!

Steve Buckner · Joined: 22 Apr 2003 Posts: 839

jim P lewis · Joined: 11 Aug 2008 Posts: 102

Ace -Just went thru this issue myself. More than likely the Clutch baskets has grooves or notches worn in to the teeth on the basket. You need to take the clutch plates out and file out the notches.
Make sure to keep the filings out of the gearbox/cases when filing.

Good luck!
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Jim Lewis

Vista CA

jim P lewis · Joined: 11 Aug 2008 Posts: 102

Ace -Just went thru this issue myself. More than likely the Clutch baskets has grooves or notches worn in to the teeth on the basket. You need to take the clutch plates out and file out the notches.
Make sure to keep the filings out of the gearbox/cases when filing.

Good luck!
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Jim Lewis

Vista CA

Ace Rossi · Posted: Sun Sep 30, 2012 4:05 pm Post subject:

Jim that sound exactly what my buddy was trying to explain when Si wasnt listening! Smile

Would it be best if I drained the trans and removed tbe clutch to do this?

Steve Buckner · Joined: 22 Apr 2003 Posts: 839

Ace, Could you let us know what fixed the problem. It would help others down the road.

Thanks, Wink

Ace Rossi · Posted: Sun Sep 30, 2012 6:03 pm Post subject:

Steve I sure will when I get to it but until I know if I should drain and fix first, then I'm not attempting it! LOL

jim P lewis · Joined: 11 Aug 2008 Posts: 102

Drain oil - otherwise when you take the clutch cover off you will have a huge! mess.
Just take the clutch plates off the basket and file each finger on the basket if needed. You are probably going to see and feel grooves that are worn in to the fingers.
You can file the grooves out with a small file.
Place a clean shop towel under the basket inside the cases to catch the filings.
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Jim Lewis

Vista CA