rebuilding the stock top end

[joesvs]

hi, i have a 06 blaster that has a full dg exhaust, dg bumpers, and has been rejetted...

well it has finally started to die (about 350 hours) i already have the new piston and an extra cylinder that was already bored...my questin is..

1. do i need to run it ritcher (still have the stock oil injection)
2. what is the proper way to break it in?

its still running and had decent power, its been slapping for a few months and after playing in all the snow its starting to knock...im going riding this weekend and really want to take it,i also have an 08 raptor 250se custom but its very loud, i did lots of mods to it and we ride late at night, (full gytr exhaust, skid plates, bumper, jetting, and changed the cdi rev box)

thanks

 

[Braapbraap95]

Thats what my shop did when they did my complete rebuild... They bumped me up a jet. Then you gotta ride it pretty easy for ten hours.

 

[darealblaster]

hey i saw you in raptroforums!!!! that place sucks,nobody answers your questions, anyway in the DIY section I posted a link to a youtube page where there are alot of videos,here theres a video on how to rebuild the top end of a 2-stroke, heres the link of the thread ..DIY- How to Videos - Yamaha Blaster Forum, and for breaking it in,theres a sticky in the DIY section also.

 

[xjma]

extra care should be taken to break it in real slow if you use a forged aftermarket piston.

 

[pittboss45]

One of the biggest things to consider is the cold weather. Since you are just up the road from me, I can tell you that if you are considering running that bike now, you had better be rich!!!

The jetting that you might have been running up till now will not be enough.