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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.


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  #11  
Old 05-26-2010, 08:22 AM
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if you run open clutch cover, it makes the clutch almost silent.. until you pull the lever. i don't miss the clunk sound at all, i thought i would. i know if the jingle went away, i'd probably be disappointed...

imho it's a simple mod that is very effective. barnett kinda attempted the same thing with their concave 2 piece friction, but i hated that thing. that was a failure waiting to happen, and it could not be adjusted.. with an old friction plate/playing with stack height you can find neutral very easy at stop. if you go to tall on your stack, you definitely will have a load on mainshaft bearing. i haven't even been into my duc clutches in a few years, and can't even remember optimal stack height, that's how well the mod has worked for me.


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  #12  
Old 05-26-2010, 09:09 AM
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just finished switching my gasgas to cr250 frictions and steels. i milled the inner hub thrust washer to 2mm thick (was 3mm). it works perfect, and i get a more progressive clutch feel (duh - new plates!), friction plates are 3mm thick gives me stronger fingers on frictions, and clutch replacement now only costs $44.99 - woohoo!

i could have milled thrust washer to 1.8mm to be exact, but i though .2mm thicker might give me a bit more pre-load on the springs so the plates lock up more solid.
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  #13  
Old 05-26-2010, 10:57 PM
flybars flybars is offline
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Please keep us posted on your cr250 clutch pack! Hopefully it will work well and hold up well. Where would I go to have the inner thrust washer milled to 1.8 mm or 2mm, or possibly to purchase one already that thickness?
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  #14  
Old 05-27-2010, 03:35 AM
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suzuki part #08211-22423 should work. it's $2.63 retail. it's 2.0mm thick. i may order a few and grind to 1.5/1.8 and see how they feel.
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99 ec300 (now a pile of parts which are for sale)

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  #15  
Old 05-27-2010, 12:36 PM
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Thanks, and let us know how your new clutch is working.
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  #16  
Old 05-30-2010, 03:20 PM
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so here is what i found - ran a race today with the complete cr250 clutch. it works, and hooks up, but it drags a bit - i think it's due to the clutch inner hub expanding and tightening down on the steels. i think it was aflica that posted he shot peens his inner hub - which is what i am gonna try next - i've gotta make some more measurements to check. i also didn't have the regular trans fluid i use (mtl xl 75weight) and ran klotz flexdrive 30 which feels heavier. and that could have had something to do with it.

i also found that the aftermarket tmx shift lever sucks. i replaced it last time it got bent. 2nd time it's got bent and ends up hitting the stator cover - makes it very very difficult to upshift - i ended up doing a lap wth 2 choices (1st gear and neutral) that sucked.. or maybe it spun on the selector shaft - i gotta check..


also got to meet barry hawk today, who promptly lapped me he seemed like a nice guy
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  #17  
Old 06-01-2010, 01:07 PM
sen480 sen480 is offline
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Default brocken clutch plates

I have been GG for 5 years. When I first got on one I was having the same problem breaking the inner 2 clutch plates. I have found that the best fix is to put in the fsr 450 clutch springs. (They are Green) Since my first Ec 250 as soon as I get a new bike I always put the green springs in and have not had a problem since. Hope I was some help. Jim Senecal
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  #18  
Old 06-01-2010, 03:15 PM
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yep - i broke the inner 2 plates. what is the difference on the green springs??
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  #19  
Old 06-01-2010, 04:14 PM
sen480 sen480 is offline
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Default brocken plates

The Green springs are heiver.
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  #20  
Old 06-01-2010, 05:51 PM
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think i can preload the stock springs with a washer to get the same effect?
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