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Old 02-24-2009, 06:56 PM   #1
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Default Clutch and flywheel install question [pics]

I don't like being the new guy and getting hung up on seemingly simple items, but I'm not sure how to get beyond this one. I searched a little bit and I know how it is supposed to be, but this setup isn't like that.

It's a thunder tiger pro .21 engine with a new flywheel and clutch setup from a jammin x1 buggy. I know the flywheel is down tight and it is locked to the crank nicely. It seems to me that either the crank is too short or the clutch shoe posts are too long. If I take the rear bearing out, the clutch/gear slide down until they hit the posts....and then crank is still about 2mm too short. It's down below the bearing 1mm and I need about 1mm of "slop" in the clutch from what I read.

What's up with me not being able to post pictures?...put an 'http' in front of these and you'll see 'em.

i270.photobucket.com/albums/jj86/projectxj/rc/IMG_1006.jpg

Is it an acceptable solution to cut the posts down?

i270.photobucket.com/albums/jj86/projectxj/rc/IMG_1007.jpg

They stick up above the clutch shoes about 1mm. It seems like that might be enough for me. Although that would make the inside face of the clutch ride on the shoes and that doesn't seem like the best idea. What am I missing here?
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Old 02-24-2009, 07:04 PM   #2
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I'm feeling helpful tonight.. you need to post those pics directly in the thread, no one wants to mod the URL.



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Old 02-24-2009, 07:11 PM   #3
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Thanks...I know how to do it. It just wouldn't let me until I have a certain number of posts.
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Old 02-24-2009, 07:26 PM   #4
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Well, for one it looks like your clutch nut is upside down.
As for the issue at hand, I have several thoughts running
through my head, but as I think more on them, nothing seems
to make any sense to me. The only two possibilities I can think
are 1) The bell is too deep, and or 2) the Jammin set up you're
trying to use for whatever reason simply won't work properly on
the TTR engine.
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Old 02-24-2009, 07:27 PM   #5
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Quote:
Originally Posted by NitroOB4You View Post
Well, for one it looks like your clutch nut is upside down.
Good to know. I wasn't sure about that one. I'll flip it over and see if it makes any difference. I don't see why it would though.
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Old 02-24-2009, 07:33 PM   #6
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Trim down the flywheel collet a mm.

You could also use one of these:







It comes in this shim kit from Ofna
http://www.carolinasrc.com/Webstore/...?idproduct=532
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Old 02-24-2009, 07:37 PM   #7
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Nice. I thought about that, but didn't have a pic handy and didn't know how to describe them, lol. Good lookin out mfrosty
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Old 02-24-2009, 07:39 PM   #8
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Is that to be used in place of the collet?
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Old 02-24-2009, 07:44 PM   #9
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ofna has a clutch shim kit that has small enough shims to fit inside the middle of the bearing for the screw. i needed it for my 808 clutch on a v-spec.
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Old 02-24-2009, 07:45 PM   #10
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Quote:
Originally Posted by fatwreck View Post
Is that to be used in place of the collet?
No, this is used to hold the clutch bell on with a screw.
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Old 02-24-2009, 07:45 PM   #11
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No. you put the screw through it, on the outside of the bell. The small lip goes toward the bearing.
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Old 02-24-2009, 07:46 PM   #12
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Quote:
Originally Posted by NitroOB4You View Post
No. you put the screw through it, on the outside of the bell. The small lip goes toward the bearing.

Correct, and that small lip on the bottom should take up that gap you're seeing.
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Old 02-24-2009, 08:26 PM   #13
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Cool. Thanks for the help.

I thought about adding some washers down inside the bearing and then putting the screw through a larger washer on the outside to cap the whole thing, but I couldn't find any washer to fit the bill. That piece will do just that though.
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Old 02-25-2009, 11:00 AM   #14
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How many shims do you have behind the flywheel? How much space is there between the flywheel and the front of the engine case? It almost looks like the flywheel is spaced out too far from the front of the engine.

1 or 2 of those shim washers behind the flywheel, just enough so the flywheel clears... the flywheel may be tight but not pushed back all the way... I can't see that the engine shaft would be THAT much different.
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Old 02-25-2009, 11:05 AM   #15
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Quote:
Originally Posted by DOMIT View Post
How many shims do you have behind the flywheel? How much space is there between the flywheel and the front of the engine case? It almost looks like the flywheel is spaced out too far from the front of the engine.

1 or 2 of those shim washers behind the flywheel, just enough so the flywheel clears... the flywheel may be tight but not pushed back all the way... I can't see that the engine shaft would be THAT much different.
And remember when you are changing things like this, after every change loosely put the engine in the chassis and check that other things line up. Like in this case that the flywheel still is centered enough in the chassis hole for the start box wheel. Or at least fit in the chassis hole if this has pull or roto start.
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