HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
honda500

for the folks who use a mikuni tm flatslide carb

9 posts in this topic

i have a tm34 mikuni flatslide carb on the way and i wanna know if i need a fuel pump or not. anybody here have a tm carb with or without a fuel pump

Share this post


Link to post
Share on other sites

The fuel pump is part of a pumper Carburetor. It pumps fuel (squirts) to make the engine respond faster. Edelbrock , Mikuni and FCR Kehin carburetors are pumper carbs. A TM40 is a Mikuni pumper carburetor, I have one for my XR650R. I had a 36mm TM36 Mikuni on a 84 XR500 and it rimped compared to stock setup. Had a 38mm pumper on a 94' XR600R. I have a Edelbrock 40mm X 42mm pumper on my 680cc XR650R. I don't think you need a fuel pump as in "To pump fuel out of the fuel tank ". But, a carburetor with a fuel pump meaning, "a pumper carburetor" it's the type of carburetor that is being talked about. Three major carburetors, talk about here; Round slide that just draws the fuel through the jets with vacuum (stock XR650R has this) has a lag time off idle if you wack the throttle. CV (Constant Volocity) uses Vacuum to pick up the slide, (what the XR650L uses) it's a good street carburetor but, sucks for real dirt riding. Then you have the pumper carburetors, has a fuel pump that squirts fuel to over come lag time. Very responsive once tuned right. They come Flat slide and round slide. TM Mikuni's are pupmer carburetors.

Share this post


Link to post
Share on other sites

the reason i ask is because on the dennis kirk mag, they say that the tm carbs are to be used with a fuel pump for instance with a snowmobile. but the seller said he just bolted it on. i just wanted to know if he was just trying to sell it or not.

Share this post


Link to post
Share on other sites

G-R-A-V-I-T-Y fills the bowl.a sleds tank will sit low and might need a pump to get gas up to the carb.........never need one on a dirt bike unless there is blockage in the line

Share this post


Link to post
Share on other sites

Some fuel tank need a fuel pump to pump fuel from one side to the other but, this is not about a mikuni , just might be where the confusion is coming from???

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0