exploded yfz450 motor

[k-town quad boy #5]

i def. agree especialy once you put power to them they just dont hold up.
so how does the non programmable rev box mess it up because i have an adjustable srp metals box. maybe that isnt helping anytihing?

[A.T.P. RACING]

The timing map in the box was designed for a stock engine. The SRP and or Pro Comm boxes were also designed to specifically enhance the performance of a stock application. Once you make changes like increased compression or more efficient cylinder head air flow, you have to make adjustments to compensate for the increased performance.

As with any good build, be it ATV or Automotive , years of hands on experience, hundreds of thousands of dollars worth of R&D, tens of thousands of dollars worth of testing equipment, ( Dyno, Flow Bench, ect...) have taught us that not only using the best parts that the many different industries have to offer, the little things like tuning a quad properly, will not only yield the best possible performance, but will keep it running properly for many many hours.

A person can waist a lot of good money if they are unsure of what they want but really need, or if there builder does not have the proper equipment to do the job.

I hope all of my rambling will help you in one way or another. It is no secret that the YFZ's are probably the most prone to engine failure, but they can also be a good quad as well.

Mike
ATP Racing

[Fox17]

that engine sucks. are you gonna look for a new motor or a whole new quad?

p.s. i sent ya a pm bout that 250R k-town quad boy #5.

[novadave]

mine is an 04 and still kickin, but i got my fingers crossed 

[quad control]

Don't feel bad here's my Honda

[sykolincoln]

YAY!! for 2 strokes!!!

[k-town quad boy #5]

The timing map in the box was designed for a stock engine. The SRP and or Pro Comm boxes were also designed to specifically enhance the performance of a stock application. Once you make changes like increased compression or more efficient cylinder head air flow, you have to make adjustments to compensate for the increased performance.

As with any good build, be it ATV or Automotive , years of hands on experience, hundreds of thousands of dollars worth of R&D, tens of thousands of dollars worth of testing equipment, ( Dyno, Flow Bench, ect...) have taught us that not only using the best parts that the many different industries have to offer, the little things like tuning a quad properly, will not only yield the best possible performance, but will keep it running properly for many many hours.

A person can waist a lot of good money if they are unsure of what they want but really need, or if there builder does not have the proper equipment to do the job.

I hope all of my rambling will help you in one way or another. It is no secret that the YFZ's are probably the most prone to engine failure, but they can also be a good quad as well.

Mike
ATP Racing

yup ben through to many of them. was gunna get a suzuki but i already have tons of extra parts for my yfzs

[k-town quad boy #5]

Don't feel bad here's my Honda

haha YEAS. only the best have holes in there motors! more airflow lol
but atleast yours spared your cylinder for you

[Tecatematt]

haha that sucks man i can feel your pain though. my father raced his bike forever gave it to me and after ten mins this is what i did. theres more pieces i just have to get them out of the exhaust