I got this bottom end kit and a pro x top end in my yz125 have about 6 hours on both. And no problems at all
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Very well made.
This is going to be interesting despite the negative reviews of others with wiseco bottom ends , but so far I have not had any issues with this bottom end , I have rode the bike fairly hard ( 09 yz450f) on track and off and everything has stayed together , now if I was to do it again I would go a different rout do to the number of times I have herd bad things about there bottom ends from bike shops and other reviews . I hope everything goes well with a lot more hours on It, oh and keep your bikes maintained !!
barely made it through break in. ran 15 minutes . have used wieseco pistons with excellent performance but this crank was a piece. not recommended at all
I had just purchased this crank a week ago, only ran one tank of gas through it, then the rod bearings blew. I didn't even put 2 hours on it, or ride it even remotely hard. Motosport will be shipping me a new one because the part seems to have been defective. Ill install the new one and hopefully it will last much longer than this one.
Needle bearings go out.
After 14 hours, needle bearings on crank went out resulting in excessive play in piston rod. I have seen a few of these Wiseco cranks experience similar failure with only a few hours use. Replacing crank is never fun, I was frustrated to encounter this problem, called Wiseco and they said I had to work with Motosport, Kellen at Motosport.com was great to work with and helped out with my return. My advice is to stay away from aftermarket cranks and get OEM.
I am a factory trained Suzuki technician and after my first wiseco crank went out they warrantied it and then not even 5hrs later the new one went out again! Absolute junk. I will never buy anything wiseco again.
Great product, no shimming required. Half a race season in and no problems.
this stuff is always solid, use it in all my builds and motor replacements and have never questioned quality
2007 CRF 150R. Wiseco did there homework on this kit. It had everything you need to change the crank - the top end kit. Went in easy and fast. I haven't ran it much to know how long it will hold up but so far so good. It is holding up to my son's racing.
Wiseco Complete Crank Kit
Wiseco Part#: WPC128A
B1022 - Top End Bearing 18 x 22 x 23.5mm
B1050 - Crank Pin Bearing 24 x 32 x 19.8mm KU
B5034 - Main Bearing 28 x 72 x 18mm
W5805 - CRANK PIN - HOLLOW - 24MM X 59MM
W5979 - Thrust Washers (2) 24mm ID x 1.5mm
WB1083 - Bottom End Gasket Kit Kaw KX250 '02-04
WPR133 - Rod Kit - Kaw. KX250 '78-07
Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.