TheTM36 Mikuni carb used with this kit, has a flow nozzle on the accelerator pump which can be adjusted to the bike's fuel demand. We can also help with jetting suggestions. If you end up changing your exhaust, I can provide you with a Mikuni tuning and jetting article that will show you an easy step-by-step method for determining your needed jetting. We can't customize jetting for every combination of performance parts that may be installed on a customer's bike or for all altitudes where a customer may ride. All of our kits are jetted for stock bikes, which are ridden between sea level and 3500 feet. You can contact me at you for your interest in our kit. I can give you some instruction with that if you get the kit. You may need to adjust the spray of fuel entering the mixing chamber of the carb to achieve optimal flow for your engine. Too much fuel can also cause a delay in throttle response. Depending on the altitude you ride, you may need to adjust the jetting some and you may need to adjust the accelerator pump. The accelerator pump is the obviously the more practical (and least expensive) arrangement for the XR400R. There are only two practical ways to achieve a nearly instant wide open throttle without an initial delay - that is either with fuel injection or by using a carburetor with an accelerator pump. This particular item is with the on body choke setup (pull knob located on carb body). Aftermarket, larger capacity fuel tanks may require the use of a remote choke. We offer these kits with an on-body choke, or with remote choke setup. Our signature Red anodized CNC adapter pre-installed - Made in-house.Additional jets for performance modifications.Genuine Mikuni carburetor, and internals.Improved cable design with increased length for proper installation with the TM36.
XR400R MIKUNI BSR42 CV CARB INSTALL
To make the install even easier, we include a brand new push/pull throttle cables that work with the factory throttle assembly. We manufacture and install our own aluminum adapters in house for easy installation and a perfect fit. We also include 3 additional main jet sizes, as well as 2 pilot jets as optional jetting to ensure you are covered in almost any situation. Each carb is pre-jetted for most applications straight out of the box. Jetting does not play as significant a role as with other non-accelerator pump carburetors. The Mikuni accelerator pump equipped carburetor will not only make your XR400 much easier to start but it will also eliminate the annoying flat spot that we are sure you have noticed. This Honda XR400R 36mm Mikuni carburetor kit is the most significant bolt on performance modification you can provide for your XR400R.
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