Engine/Crank

Super useful crankshaft package, includes new high performance heavy duty crank (stage6), new bearings and seals (S23) , and a tube of sealant for ...

Crank seals for your 89-01 zuma, and 02-11 zuma.  It is wise to replace these if you haven't done them yet. Even the bugeye zumas are getting old e...

Case dowel pin for Zuma 50 1989-2011. This is the dowel for the two case halves, not the one for the transmission cover! 

Yamaha OEM Piston Pin, 12mm for YSR50

Yamaha OEM Piston Circlip for YSR, 12mm 

Due to the increase in cost to purchase this OEM part, we have decided to stop stocking these. However we encourage you to check out some of these ...

Grab a Polini reinforced top end bearing for your next build. These fit several 10mm scoots, please verify fitment before ordering.  10mm -10x14x13

Replacement OEM quality wrist pin bearing from Naraku.  Measures 10x14x23 

Grab a Zuma replacement woodruff key for your next build. These are the little things that end up stopping you in your tracks on a build. Remember,...

It's always good to replace your woodruff key when you get a new crank, or maybe your existing one sheared off due to improper assembly? Whatever t...

Top performance full circle racing crank for your 02-11 zuma, sr50, f12, jog, etc. Fits any minarelli horizontal engine! Comes with maximum perform...

First polini 4 race cranks to hit usa. Yep. For minarelli/zuma horizontal or vertical. Polini is well respected for their quality and design in the...