keihin 39mm flatslides for 900rr - Honda Motorcycles - FireBlades.org
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post #1 of 3 Old 08-26-2004, 2:03 PM Thread Starter
 
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keihin 39mm flatslides for 900rr

I picked up a set of these carbs for $300 and plan to install them this winter. wondering if anyone here has a set, and what kind of power to expect from low-mid-high rpm. the motor is otherwise stock, the only other mod I may make is some head/valve work. I hear these carbs are some tricky suckas to tune, i.e.-using bosch o2 sensor connected to a multimeter to fine tune the mixture. any input would be great.
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post #2 of 3 Old 10-27-2004, 6:59 PM
 
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Re: keihin 39mm flatslides for 900rr

Quote:
Originally Posted by loper
I picked up a set of these carbs for $300 and plan to install them this winter. wondering if anyone here has a set, and what kind of power to expect from low-mid-high rpm. the motor is otherwise stock, the only other mod I may make is some head/valve work. I hear these carbs are some tricky suckas to tune, i.e.-using bosch o2 sensor connected to a multimeter to fine tune the mixture. any input would be great.

well i have a fren running on these carbs when he bought the bike. i did ask the previous owner abt fine tuning it, he said it was kinda tricky to tune n finally had some jap engineer done for him. this thing works well with a racing CDi unit.
performance wise, it blows off the 893 n 919 with some mods- the performance is quite at par or slightly better than a 929 (but this is seen after ohlins fronts n rears, magnesium rims, 3x clamps, reworked clutch and some carbon fibre bits.)
when this is done ur low end <3.5k rpm the bike will sputter n spit around like its dying off. if ya keep moving with the low rev its gonna hurt ur plugs.
when u hit >5.5k rpm the thing will really show its extra edge. that is where other mildly tuned bikes will begin to see ur tailights....
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post #3 of 3 Old 10-28-2004, 2:20 AM
 
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Re: keihin 39mm flatslides for 900rr

Quote:
Originally Posted by moron900
when this is done ur low end <3.5k rpm the bike will sputter n spit around like its dying off. if ya keep moving with the low rev its gonna hurt ur plugs.
it gets even worse if you have 42mm carbs

Look, Lean, Believe..
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