Keihin Carb??? anyone run it?

[imreallyquick]

http://www.denniskirk.com/jsp/produ...&catId=&productId=p16259&leafCatId=&mmyId=323 has anyone ran this carb before...and how does it work????

 

[DeadLastRacing]

Works great! its an awesome upgrade over stock. Keihin > Mikuni

 

[Jebbysan]

It doesn't appear to have an accelerator pump......am I right about that?
I think it would be great for a healthy motor (cams,porting,etc...)
I do not see how it would be an improvement over the stock carb on a
stock internal engine.....

jebby

 

[Jason350]

I run one on my 94, heads been ported and polished, full exhaust and bored 40 over with wiseco 10.25-1 piston and it runs awsome!!

 

[duneracerweston]

It will run better on a stock motor but the real difference is when you strap it to a fully built motor but I haven't gotten to take a keihin and work with them much so I can't say which is best but I really like my 38mm mikuni

 

[imreallyquick]

alright well i got the 396 stroker kit, port and polish, .390 cam i believe, and valve springs will it make a big difference or should i look for something different, and i got exhaust too btw

 

[beastlywarrior228]

ive got the 38mm mikuni to use with the 446 but a 37mm keihin fcr is the way to go

 

[DeadLastRacing]

for what ever reason I think mikuni gum up faster then the keihin carbs do. Plus, rounds slides are just ergonomically better when it comes to operation and flow.

 

[duneracerweston]

You will notice a good sized difference in power with thaqt carb on a 397 motor but the trick is jetting the jets aren't even going to be close to the same as what you would have been running in a stock carb I went from a 150 to a 230 to make it run right

 

[3504life]

has any one bought parts off that site?

 

[Hdale85]

You will notice a good sized difference in power with thaqt carb on a 397 motor but the trick is jetting the jets aren't even going to be close to the same as what you would have been running in a stock carb I went from a 150 to a 230 to make it run right

So......it uses A LOT more gas?

 

[duneracerweston]

No since the carbs intake more air it needs more fuel to equal it out at wot but you won't notice a big fuel mileage chainge

 

[imreallyquick]

im at a 160 on my stock carb with stock airbox and no mods done to it at all...n im gunna put a uni filter on it with an outerwear when i get this carb for it...so im thinking im gunna have to jump up a lot

 

[imreallyquick]

n the reason im changing really is i think it could be faster then what it is n if i hit a little jump n land when i land it loses fuel for a second n i almost go flying over the handle bars it does it really bad up at silver lake sand dunes when im in like 5th or 6th going over bumps...

 

[nissan87man]

What jetting are u guys using for this carb? I can ony get it to idle, as soon as I move the throttle it dies. Is it to rich, my plug is a dry black color. My jetting right now is 42 pilot, 160 main, needle in third slot

 

[duneracerweston]

Try moving the needle to the top slot and see if its any better

 

[elwood]

yes it is rich, try adjusting the needle like weston said, also main jet might be too big. Another thing to check is your idle, turn it up a hair and see if it stays running when you gas it. The rich jetting and dieing of idle could be two different things

 

[nissan87man]

I have it close now,moved needle to fourth clip, 42 polit, air screw 1 3/4 turns out(Does turning it out make it leaner or richer?). 160 main, eveything is good in mid and top range. Only problem is if I twist the throttle very quick at idle it wants to die, if I twist it smoothly at idle its fine(is that because there is no accel pump?), also with clutch lever pulled in coasting down a hill at idle it stalls. Do I need a bigger polit jet?thanks

 

[elwood]

by your jets I thought you had a stock carb, but you said it doesn't have an accel pump, stock has one, so what carb do you have?

 

[duneracerweston]

In the kehin and makuni neather has a accl pump run the air screw out or in about 1/4 turn and run it may have to go to the fith screw but maybe not