Spooky expansion

I put one on and couldn’t be happier with the performance gain and the plug burns much cleaner. You get more smoke at idle but it does clear out at speed and depending on your engine placement you may have crank clearance issues. Yes it is very loud and I love it, it’s not deafening, but just loud enough to let the cars around you know that your there. Oh and I think it looks great.
 

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Thanks 1 low (^)

While I run the SBP pipe - it's good to get a review of another, particularly Spooky's! Didja have crank clearance probs? How did you fix it if ya did? Where in the rpm range did you notice the most change?

Questions... I haz dem :D
 
BarelyAWake said:
Thanks 1 low (^)

While I run the SBP pipe - it's good to get a review of another, particularly Spooky's! Didja have crank clearance probs? How did you fix it if ya did? Where in the rpm range did you notice the most change?

Questions... I haz dem :D
Click to expand...

Hey BA.. How is your SBP pipe? How much more power did you get?

Am seriously considering ordering one..

xct2
 
How much "more" is a tough question as my top speed didn't change much, there's a definite low to mid RPM effect that does wonders for my acceleration. On a 1/8 mile stretch on my way to work I was able to achieve and hold top speed (from a dead stop), whereas before on the stock pipe it was still winding up when I got to my turn.

I wish we had a dyno for this sorta thing lol

Here's some info;
http://motorbicycling.com/f3/skeptics-review-sbp-tuned-pipe-11282.html

...and me runnin' around in circles :D;
http://motorbicycling.com/f15/sound-sbp-expansion-chamber-12466.html
 
The biggest improvement was mid to high rpm I picked up about 4-6mph. as for the crank clearance I widened them about 2” to clear the pull start and gave just enough room, but it probably would be a non issue on a mountain bike frame since on average the engine seems to mount higher
 
Interesting - I'd bet the difference is in the length of the header pipe, Spooky's is real short in comparison to the SBP one, which seems to go on forever...

Nice that they effect opposite ends of the powerband, good to have a choice out there for people's different interests! I for one got exactly what I hoped, an increase in acceleration - I can see a lot of folks that'd want top end tho.

(^)
 
BarelyAWake said:
Interesting - I'd bet the difference is in the length of the header pipe, Spooky's is real short in comparison to the SBP one, which seems to go on forever...

Nice that they effect opposite ends of the powerband, good to have a choice out there for people's different interests! I for one got exactly what I hoped, an increase in acceleration - I can see a lot of folks that'd want top end tho.

(^)
Click to expand...

Lol i want top end HAHA

xct2
 
That is the beauty of our pipe, it is adjustable, if you want more top end just shorten the pipe..
 
Ghost0 said:
That is the beauty of our pipe, it is adjustable, if you want more top end just shorten the pipe..
Click to expand...

I just bought the chamber minus the kit from you guys last week to use on my current “boardtracker” project. Really looking forward to comparing the two. By the way I’m very impressed with the quality.
 
For the Spookytooth chamber I moved the carb needle setting to the second notch from the top and run the spark plug at 28 gap and port matched the intake and that made her run like a dream.
 
I have been running the sickbikeparts expansion chamber for 2 months now... it is SOOO worth it for us shift kit boys....
 
1 low 64 said:
The biggest improvement was mid to high rpm I picked up about 4-6mph. as for the crank clearance I widened them about 2” to clear the pull start and gave just enough room, but it probably would be a non issue on a mountain bike frame since on average the engine seems to mount higher
Click to expand...

i was thinking of doing this pipe to one of my bikes...it already has plenty of low end so i figured the short tube to the chamber would increase my top end...thanks for the review...im gonna have to try it...oh yeah...did it come with a gasket???or am i making one again
 
Mine didn’t come with a gasket. I always use the exhaust gasket that Piston Bikes sells, it’s already pretty close to matching the port and never had one blow out.
 
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