07 Shineray exhaust mod and a carb question. With pics.

[katoranger]

I have found the the no backpressure thing is true if you have done the right mods to accomodate that setup. ie. main jet for more fuel. 2 strokes are a whole nother thing.

Allen

[TeamCheap]

Well you have to do the whole thing you cant get away with just opening up the exhaust alone.
Maybe if you just drill it out a little you might not have as big a impact but what I did was like night and day.(but why even bother for just a little increase )

As I have posted before the K&N airfilter helped a little bit but I got it to run without having to rejet it but a size bigger jet probably would have made it easier to retune but I didnt have the jets at that time.
After adding the free flowing exhaust rejetting was MANDATORY, no way around it it just had to be done but I was ready and just installed bigger jets until I got it to where it is now.
Went from a stock 98 to a 115 and I believe the first larger jet I tried was a 110 and I still feel that a 117.5 would be perfect.


I had several goals in mind when doing mine :

1)get rid of the lousy leaking stock airbox
2)flow more air to increase performance
3)get rid of stock muffler before it starts to rattle apart
4)give the bike a much better sound than that jetsons putt-putt sound

These are some of the simplest mods that return the most performance increase IMO.

I would guess that it has impacted the fuel ecomony a lot but I dont care since mine is a play toy.(top off the tank before every trail ride)

[katoranger]

I rewelded one of the seams on the muffler and can attest to the tin cans.

I think this summer will see the UNI filter and exhaust mods. I need more power now.

Allen

[MATT]

In regards to changing the needle position, I found that it is pretty easy to do if you remove the seat and gas tank. Shouldn't take more than 10 minutes.

[Dragon]

This might be a dumb question: why don't manufacturers make bikes with larger jet and free flowing exhaust and save enthusiast the trouble of having to do it?

[coleary15]

b/c they want the consumer(us) to break there equipment, there fore causing us to buy there supplies to fix it and just 2 pi$$ every1 off

just my 2-cents :]

[Mountainwolf]

Originally Posted by MATT

In regards to changing the needle position, I found that it is pretty easy to do if you remove the seat and gas tank. Shouldn't take more than 10 minutes.

Matt,

Yea I wish mine was that easy, the way the top of the carb is located on mine I can unscrew the top but it won't come out, hits the top of the frame. Have to remove the carb, PITA. Oh well, got it set right now I thinks.

Wolf

[Mountainwolf]

Originally Posted by Snake

This might be a dumb question: why don't manufacturers make bikes with larger jet and free flowing exhaust and save enthusiast the trouble of having to do it?

Snake,

Then what would we have to do when the weather sucks and don't wanna ride in the rain? Hell, I spend a good part of my summer wrenching my snowmobile and praying for snow.






Gotta tinker man!!

Wolf

[fatboy250]

Hey Wolf,
This the exact mod I did on mine many miles ago. However, I did remove everything inside the can with a press. I agree the increase in performance is negligible. So, I just drilled the '07 bike with a home made 5/8" extension bit and left it at that.

Great pics for everyone to see. I like your post. Keep up the good work!!

Jason