what size threads are on the crank/holds the flywheel on? - Yamaha Raptor Forum
 
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post #1 of 8 (permalink) Old 08-12-2013, 08:53 PM Thread Starter
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what size threads are on the crank/holds the flywheel on?

I just don't want to mess anything up

2004 YZ 250
Pro circuit platinum pipe, R304. Wiseco piston, boyesen reeds

2002 Raptor 660
Curtis Sparks X6, Foam Pro Flow Kit,
Alba Needles, Airbox lid removed, 160L-165R mikuni mains,
25 pilots, fuel screws 2 1/8 out, flipped rear link, clear tube mod
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post #2 of 8 (permalink) Old 08-12-2013, 10:18 PM
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M14x1.5mm on the oneway side
M20x1.0 on the clutch side
measurements taken from an '01 crank
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post #3 of 8 (permalink) Old 08-12-2013, 10:30 PM Thread Starter
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Originally Posted by 1stquad View Post
M14x1.5mm on the oneway side
M20x1.0 on the clutch side
measurements taken from an '01 crank
Thanks...I have an '02 engine/'01 frame I wouldn't think their any different? what's the best way to tighten the flywheel nut....I've been reading bad storys, what name brand and what tools? I might see if my local yamaha shop can do it for me?

2004 YZ 250
Pro circuit platinum pipe, R304. Wiseco piston, boyesen reeds

2002 Raptor 660
Curtis Sparks X6, Foam Pro Flow Kit,
Alba Needles, Airbox lid removed, 160L-165R mikuni mains,
25 pilots, fuel screws 2 1/8 out, flipped rear link, clear tube mod

Last edited by raptor660r101; 08-12-2013 at 10:54 PM.
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post #4 of 8 (permalink) Old 08-12-2013, 10:33 PM
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Same size for that year, and use a torque wrench obviously but get a strap wrench or chain wrench to put around the harmonic balancer so it won't move lol, have a buddy help u with that too.
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post #5 of 8 (permalink) Old 08-12-2013, 10:47 PM Thread Starter
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Quote:
Originally Posted by Winch660 View Post
Same size for that year, and use a torque wrench obviously but get a strap wrench or chain wrench to put around the harmonic balancer so it won't move lol, have a buddy help u with that too.
What's a good torque wrench? I only got a cheap $20 one, I'm afraid ill over tighten with it
I've also read about people breaking strap wrenchs....and saying they messed up the flywheel from holding it to tight with the strap wrench....they was using craftsman strap wrenchs and broke 2 of them

2004 YZ 250
Pro circuit platinum pipe, R304. Wiseco piston, boyesen reeds

2002 Raptor 660
Curtis Sparks X6, Foam Pro Flow Kit,
Alba Needles, Airbox lid removed, 160L-165R mikuni mains,
25 pilots, fuel screws 2 1/8 out, flipped rear link, clear tube mod

Last edited by raptor660r101; 08-12-2013 at 10:52 PM.
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post #6 of 8 (permalink) Old 08-12-2013, 10:52 PM
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If using a chain wrench an old leather belt between the chain and flywheel helps.
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post #7 of 8 (permalink) Old 08-12-2013, 11:12 PM
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Quote:
Originally Posted by raptor660r101 View Post
What's a good torque wrench? I only got a cheap $20 one, I'm afraid ill over tighten with it
I've also read about people breaking strap wrenchs....and saying they messed up the flywheel from holding it to tight with the strap wrench....they was using craftsman strap wrenchs and broke 2 of them
Lol well the specs for that is 110 foot lbs, u can use the one u got but start at like 50 ft lbs and gradually move ur way up to 110..you will know if it breaks Haha
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post #8 of 8 (permalink) Old 07-26-2019, 02:05 AM
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thanks m20x1.0 I need a tap to fix the end of my crank.
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