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Posted

how many hours should it take for my 07 o need a new top end rebuild?

 

thus being perfectly jetted and running yamalube at 32:1

 

thanks

Posted
how many hours should it take for my 07 o need a new top end rebuild?

 

thus being perfectly jetted and running yamalube at 32:1

 

thanks

 

My '03 is still on the stock top end. Still kicks good numbers (actually a little high) each time I check it. Despite the common conception, a properly tuned stock engine will run on the top end for some time. Now, if you had port work done, they tend to be somewhat harder on rings as well as the thrust side of the cylinder wall due the higher output.

Posted

ok thanks

what about if you pipe it jet it and put vforce3 reeds on i

still probably about the same i would think

buying a compression tester later down the road would probably be a good idea right?

how much are they?

Posted
how many hours should it take for my 07 o need a new top end rebuild?

 

thus being perfectly jetted and running yamalube at 32:1

 

thanks

 

It really depends on how you ride it and how you take care of it. Of course, how much you modify it also factors in to the equation. I have had a new top end last 2 hours and I have had one last 4 years. :thumbsup:

Posted
ok thanks

what about if you pipe it jet it and put vforce3 reeds on i

still probably about the same i would think

buying a compression tester later down the road would probably be a good idea right?

how much are they?

 

If you notice my signature I've got everything you mentioned plus a NOSS head with bumped up compression, timing plate, filter etc. and like I said still on the stock top end. Well, mine is a Snap-On, but I honestly can't recall how much it was. It's Snap-On, which means it is good, but I'm sure I paid a crap ton for it. One nice thing though is that it has air chuch style fittings for attaching different lines for different applications.

Posted

Like everyone else said, keep up on the maintenance, a top end will last a long time. Also, always let the motor idle until it is warm before EVERY ride, and that will help too.

Posted

Rite I bought mine used about 8 months ago its an 03 and when I put my Noss Head on I checked and its still on its original bore and Im kicking 150psi in each cylinder Mods in sig Timing Plate still not Installed. Routine matnince and how much/hard you ride will play the biggest factors. I know a few people with some stock cyl motors that are ported pretty heavly with all of the bolt ons and their topends lasted 3 years some longer.Proper jetting, fresh fuel, clean filter, and every HP mod you should find a counter mod for reliability. Dont let it run if its not running rite without checking it out. Tighten all of the bolts after a weekend of riding and your Top End will be as reliable as any other bike that is mantained properly.

 

Rite like stated make sure you warm it up to operating temp by bliping the throttle every few seconds then feel the Head when its nice and warm to the touch your ready to ride. Take it slow through the gears when starting off. Sometimes the carbs can load up on you making it sputter a little untill you blow them out espically if you dont shut the fuel off after every ride. Then let it RIIIIIIIP. Thats how I do it.

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