clutch basket and oil pump - Yamaha Raptor Forum
 
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post #1 of 8 (permalink) Old 05-24-2011, 09:04 PM Thread Starter
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clutch basket and oil pump

Ok I have a 660 raptor 03 model. The oil pump is locked up and stripped the plastic gear. Also the clutch basket has an "ear" broken off. I obviously am going to replace all 3 pieces.

What benefits if any will I see with going to a billet aftermarket clutch basket and heavy duty clutch? Also what are the disadvantages to those mods? (hard lever pull, weak clutch, etc) I also read a 660r and a yz400f are the same clutches. Is this true?

I was also wondering if they make a high volume or a better oil pump than stock? Also the oil pump gear any upgrades?

Money is somewhat an issue. I am not trying to break the bank however I dont want to be back in there in a short time either. If i can get good or better stuff than factory I am game. Just looking for good advice. Thanks guys.

Last edited by crossbred; 05-24-2011 at 09:10 PM.
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post #2 of 8 (permalink) Old 05-24-2011, 09:07 PM Thread Starter
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I am not racing this bike. I want a good "daily driver" clutch. I dont care how fast it revs I just want it to be able to hold the revs for a sustained period. thanks
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post #3 of 8 (permalink) Old 05-24-2011, 10:27 PM
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A billit basket is stronger and will be more resistan to breaking and wearing notches in it. You have to bolt the factory gear on the back of the billit clutch basket.

You might need to pull the whole engine and clean out the oil pump sump. The oil pump probably locked up due to getting debre in it, wich means the screen is plugged. You might also want to pull the head cover and see what kind of shape the cam journals are in. It is the first part to get damage when the raptor is starved of oil.

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.

97 Banshee
F.A.S.T. Dune Ported 4mill, CPI Inframes, Keihin PWK33's, Direct Drive Lockup. 158 mians, CEL needles second clip, #48 pilots, air scews 2.0 turns out.
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post #4 of 8 (permalink) Old 05-25-2011, 08:14 PM Thread Starter
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I checked the cam journals tonight. They dont look bad at all. I must have just caught it at the right time. Also is it safe to say that the cylinder is ok since the cam looks good? To ensure all metal is out of the engine do i need to split the cases and clean the screen or can i just flush it out with air and gas or some solvent?
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post #5 of 8 (permalink) Old 05-25-2011, 08:30 PM
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Originally Posted by 03LimitedEditionRaptor View Post
You have to bolt the factory gear on the back of the billit clutch basket.
Same problem I ran into when this happened to me, buying an aftermarket basket didn't do any good because I still needed the OEM gear. I ended up just buying a used OEM basket for a not insignificant amount of money.

I am not aware of any aftermarket options or upgrades for the oil pump. It's OEM only territory.

I have done it both ways, splitting cases and trying to flush it out. It can be done to a high degree of cleaning by flushing, but it will take multiple flushes, lots of oil, lots of time, and repetitive cleaning of the return line screen in the oil tank. Even then there's no guarantee that the scavenger screen isn't partially clogged. The right way is to pull the head, check your cylinder, split the cases, and clean the scavenger pump and everything else. But if you're willing to give it a shot to flush it, and it can work, then I would suggest diligence on your part.

Mike

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post #6 of 8 (permalink) Old 05-25-2011, 09:12 PM Thread Starter
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I have built a few motors in my life and I just wanted a little kick in the rear to make me split the cases. My basket gear isnt mess up. Just the oil pump driven gear. I guess I will split the cases and clean it right.

Am I peeing in the wind to "save" on a basket? A wiseco or magnum is $50 cheaper than a Hinson. That would buy the gasket set. Also What causes the basket explosion? Thanks for your input.
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post #7 of 8 (permalink) Old 05-25-2011, 09:21 PM
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I bought the weisco basket and it didn't fit the standard clutch hub without removing some metal from the factory one. Just a FYI
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post #8 of 8 (permalink) Old 05-25-2011, 10:06 PM
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If your factory gear is good then I would upgrade to a billit basket. The Magnum basket is a good pice for the money.

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.

97 Banshee
F.A.S.T. Dune Ported 4mill, CPI Inframes, Keihin PWK33's, Direct Drive Lockup. 158 mians, CEL needles second clip, #48 pilots, air scews 2.0 turns out.
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