That's a bit quieter alright.. Good work.
Knocking/piston slap?
Hey guys. Just wanting some advice before i go into this headfirst. I have a 2003 kodiak 450. I love this era of yamaha machines. i bought one that wasnt running from a guy who said it had been sunk. 900 hours on it. he said it needed a top end. Well the cylinder and piston were scored (mainly intake side) and the camshaft/rocker arms were completely ruined. all of that got replaced as well as the timing chain and guide. the engine rotated freely and smoothly even when using the electric starter. However i got her put together last night and it fired right up. Once i got the muffler on i could clearly hear a loud knock. the knock increases with engine rpm. it also does not like to shift all that well but if you rotate the axle back and forth some it does it okay. this knock also persists with the cvt belt removed completely. it sounds like the crankshaft hitting something to me but i am no expert. after running it for maybe 30 seconds a few times i checked timing and timing did not skip. any advice on what to look for/ what to do first? the service manual is not so great for step by step instruction.
i will say this atv was not worth the money i already have in it but i like these machines and i enjoy this type of work, my goal is to get it back to being a reliable machine*
i will say this atv was not worth the money i already have in it but i like these machines and i enjoy this type of work, my goal is to get it back to being a reliable machine*
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And about the clutch. It is not pretty. It’s got it’s original belt. The primary sheave is filled with black sludge instead of grease. And the wet clutch underneath looks pretty bad. It’s got some little chips all around it and there are slight grooves in the clutch housing. I’m assuming I’m gonna need to replace the housing and it’s expensive so I’m just going to ride it once I get my tires in and we’ll see what happens. If it rides bad I’ll go ahead and spend the money. I have $3,200 in this quad with all the cosmetics and tires so I’m hoping it’s gonna last me many more yearsOh good stuff Brock. You posted while I was typing.
Yeah I couldn't think of any real reason the clutch would knock, but all the crank bits looked so good. Did the new crank come with a rod? Sounds a whole bunch better. EnjoyAnd about the clutch. It is not pretty. It’s got it’s original belt. The primary sheave is filled with black sludge instead of grease. And the wet clutch underneath looks pretty bad. It’s got some little chips all around it and there are slight grooves in the clutch housing. I’m assuming I’m gonna need to replace the housing and it’s expensive so I’m just going to ride it once I get my tires in and we’ll see what happens. If it rides bad I’ll go ahead and spend the money. I have $3,200 in this quad with all the cosmetics and tires so I’m hoping it’s gonna last me many more years
Yeah this crank design is all pressed together and the rod doesn’t bolt on it’s just a ring. You’d need some pretty precise tools to press a new one on and measure it right. Since I have you does anyone know anything about Yamaha coming out with a grizzly 1000?Yeah I couldn't think of any real reason the clutch would knock, but all the crank bits looked so good. Did the new crank come with a rod? Sounds a whole bunch better. Enjoy
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