I have a 2002 husaberg FS550, full supermoto swap and single purpose as a Supermoto. I just lost all compression while riding friday and am figuring I'm in need of a top end. What are my options? I would like to have more power, maybe a quicker rev? Do I rebuild as a 550, can I go bigger without touching the btm end? Whats the best piston cyldiner kit to use? HELLPPP!
2002 Fs550 needs a new top end, I want more power.....
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over here they are starting to use 550's as opposed to 650's because they rev quicker. also the 650 is slightly under valved but the 550 is about right out the crate.
you must remove the head first and see what's up - grab a dose of reality first.
as far as a faster top end goes well here is a list of what you need
for speed
ported both sides and 32mm exhausts
race cam: torque or top end
dual valve spring conversion
stainless inlet valves
for reliability
modern decomp
IWIS cam chain
modern cam chain tensioner blade (use the 450/550 on the 650)
keihin FCR carb bored to 42mm or extraordinarily to 44mm with belmouth and filter
regards
Taffy
you must remove the head first and see what's up - grab a dose of reality first.
as far as a faster top end goes well here is a list of what you need
for speed
ported both sides and 32mm exhausts
race cam: torque or top end
dual valve spring conversion
stainless inlet valves
for reliability
modern decomp
IWIS cam chain
modern cam chain tensioner blade (use the 450/550 on the 650)
keihin FCR carb bored to 42mm or extraordinarily to 44mm with belmouth and filter
regards
Taffy
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