One way starter Gear - Yamaha Raptor Forum
 
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post #1 of 8 (permalink) Old 01-18-2010, 10:31 AM Thread Starter
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One way starter Gear

I replaced my one way starter clutch with an L&A last winter but used my original 2004 Starter gear since it was fine and didn't show any wear. I have 25 hours on this L&A clutch and now I have my motor down for a rebuild and noticed the surface on the starter gear where the L&A clutch bearings ride has an impression of the bearings but not really any damage. I guess my question is when is it time to change the starter clutch gear?

2004 660 Dinosaur retired to the drag strip
2006 LTR 450 Rodeo bike
2007 YFZ Woods Bike
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post #2 of 8 (permalink) Old 01-18-2010, 11:07 AM
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the gear im assuming you mean the 52 tooth gear. yes change it.
really should of done it all together but oh well.
mike

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post #3 of 8 (permalink) Old 01-18-2010, 11:22 AM Thread Starter
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Originally Posted by 02raptor660 View Post
the gear im assuming you mean the 52 tooth gear. yes change it.
really should of done it all together but oh well.
mike
Do you know what actually can go wrong with the 52 tooth gear? I noticed they sell them in a kit with the new starter clutch but like I said, last winter when I added the L&A my gear looked fine.
L&A sells a rebuild kit for the one way for about 25.00 that has new bearings and springs. Would you expect the one way clutch to need rebuilding after 25 hours too?

thanks

2004 660 Dinosaur retired to the drag strip
2006 LTR 450 Rodeo bike
2007 YFZ Woods Bike
Another one bites the dust!
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post #4 of 8 (permalink) Old 01-18-2010, 12:47 PM
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I think that is normal. That is how mine looked when I tore it down to swap from an 01-03 flywheel to an 04-05 flywheel.

2003 Limited Edition Raptor
Kenz 720cc 11:1 stroker, +1 valves, Mega Cycle X-4 Cam, Sparks 6x Big Core, Keihin 35mm FCR's. 158 mains, 52 pilots, fuel screws 2 turns out.

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post #5 of 8 (permalink) Old 01-18-2010, 02:49 PM
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The sprag bearings in the clutch ride on the smooth bearing surface of the gear. If that surface is not baby butt smooth it has already lost it's surface hardness. The new sprags will wear into the bearing surface causing more wear on the gear's bearing surface and then wearing the sprags to match...

Replacing both at the same time starts out with both having full surface hardness and so very little wear occurs over time. Replacing only 1/2 of the pair, with even minor damage to the other, guarantees that you will be replacing one or the other again sometime in the future.

In your case, in order to minimize the likelihood of future problems, I'd buy the new gear and a replacement sprag/spring kit - start fresh with full surface hardness on both halves.

'01 660 Raptor, Burgard +2+1 arms, YFZ Shocks, LSR anti-vibe, CTR pipe, jetted, K&N
'01 Polaris Scrambler 400, K&N
'02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe
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post #6 of 8 (permalink) Old 01-18-2010, 02:56 PM Thread Starter
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Well, it's sort of baby butt smooth....I guess I should buy a new gear since I can feel the impression the L&A one way made in the bearing surface. It's not bad but I guess trying to start this 720 without the decompression will require a 100% new 52 tooth gear surface. -there goes another $100.00 -POOF! -did anybody see where that went?

2004 660 Dinosaur retired to the drag strip
2006 LTR 450 Rodeo bike
2007 YFZ Woods Bike
Another one bites the dust!
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post #7 of 8 (permalink) Old 01-18-2010, 03:24 PM
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Yes, I saw... It's the cost of FUN!

Look at it this way, at least with the cost of gas here in SoCal, it's only about 5 gas jug fill-ups. Not that that helps, but at least it gives it a little perspective.

'01 660 Raptor, Burgard +2+1 arms, YFZ Shocks, LSR anti-vibe, CTR pipe, jetted, K&N
'01 Polaris Scrambler 400, K&N
'02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe
'02 Honda 400ex, DiamondJ +3 A-arm widener, Lonestar anti-vibe

Last edited by QuadManiac; 01-18-2010 at 03:26 PM.
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post #8 of 8 (permalink) Old 01-18-2010, 09:16 PM
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+1 QM. It dosent pay to do the oneway without replacing the 52T gear. Think of it as peace of mind and cheap insurance. Not being able to start the quad out on the trail could realy suck. Ride hard!!
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