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250cc and Above Engine Tech Technical Discussion Forum for 250cc and up Engines

 
 
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  #1  
Old 03-31-2010, 11:27 AM
KID4LIFE's Avatar
KID4LIFE KID4LIFE is offline
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Join Date: Feb 2010
Location: CANTON, OH
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Default hammerhead CF moto carb questions

i need some verification guys. learn me...learn me........lol
i'm looking at replacing my stock keihn CV 30mm carb with one of the 32mm keihn pumper carbs. questions are:

1. Are there any linkage, plumbing mods that will need done?
2. Will i also need a different or bigger intake boot?
3. Can i use my existing choke since it has the correct harness hook-up in case the new one doesn't match up?
4. Is there an upgrade (larger mm) intake available to get more air flow?

i think that covers it. let me know and thanks.....
__________________
07 HH250SS
UNI
HIT CLUTCH
DR. PULLEY VARIATOR
RED MAIN
17g ROLLERS
12T/45T SPROCKETS
IRIDIUM PLUG
HP CDI & COIL
LED LIGHTS

ASW CARBIDE
UNI
12g SLIDERS
RED MAIN
39T SPROCKET (coming soon)
  #2  
Old 04-01-2010, 06:55 PM
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SYCARMS SYCARMS is offline
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Location: Senatobia, Mississippi
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Default

There are 2 type Keihn 32mm carbs, the one with the auto choke and one with a manual choke. The manual choke type will need a differant accel cable. Both carbs will be rather difficult to get into the intake due to its larger size of 34mm vs, stock of 31mm. I have known plenty of people who use them but many times your boot will crack due to the stress of streching. If your buggy is stock I mean no big bore cam ect you would in my opinion be throwing money away. 30mm carb is more than enough for a non modded 250 engine. I have the large cam in mine with my ported head and the stock carb is fine. Now I anticipate that when I install by big bore I will need a larger carb probably like a 34mm. I will have to make a manifold for it though due to only stock intakes being available. Until you add a cam,ported head, and big bore go with what you have. TOM
  #3  
Old 04-01-2010, 08:53 PM
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KID4LIFE KID4LIFE is offline
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Join Date: Feb 2010
Location: CANTON, OH
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thanks tom. i thought i would possibly gain some initial throttle response by installing the pumper carb. a little extra kick on take-off.
i have one coming and i might try it just to see what it does (since i already ordered it). i got a real good deal on it so if it doesn't prove itself i'll just sell it.
__________________
07 HH250SS
UNI
HIT CLUTCH
DR. PULLEY VARIATOR
RED MAIN
17g ROLLERS
12T/45T SPROCKETS
IRIDIUM PLUG
HP CDI & COIL
LED LIGHTS

ASW CARBIDE
UNI
12g SLIDERS
RED MAIN
39T SPROCKET (coming soon)
 


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