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Our Honda XR650R kit includes a pre-jetted Mikuni TM40-6 pumper carb with pre-installed adapters, and push/pull throttle cables. Everything is included to mount this carb to your bike. This kit is well suited for stock and mildly modified engines. A more powerful, easier to start XR650R... What more could you want?
We offer these kits with an on-body choke assembly, or with remote choke setup. Aftermarket, larger capacity fuel tanks may require the use of a remote choke. This particular item is with the choke located directly on the carburetor body.
Carburetor Adaptor Dimensions: 49mm intake spigot OD, 64mm intake bell OD (both are same as factory sizing)
Note: While similar, the adapters for this kit will not fit an XR650L (NC650L, NCS650LB)
| Specification | Details |
|---|---|
| SKU | NCS238B |
| Carburetor Size | 40mm |
| Brand | Niche Cycle Supply |
| UPC | 810000480708 |
By SND6 on 10/23/2018
Niche Cycle Supply had what I needed at a reasonable price and quick shipping. The Mikuni TM40 for my XR650R is just what it needed to perform. I had it ordered from another supplier for 3 weeks on backorder. Finally googled another supplier for the carb, and go figure. Niche had it in stock and for a better deal! Thank you NCS!
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By Bernie78 on 7/7/2015
This is a very nice kit. I bought this body choke version, and installed it the day I received it. The bike runs fantastic. Its a good feeling to know its going to start on the first few kicks. Overall running performance is greatly improved. I ended up getting the parts from Niche to convert the body choke to a remote choke. Its not much of a difference, but I like it better.
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We don't have any first hand experience using our 650R kit on a L model. The carburetor should fit, but you may have issues with the cables. I believe you will need to adjust the jetting as well, but we do not have enough information on hand to make any real suggestions.
As an update to the answer provided in 2015, we now offer a similar kit for the XR650L. This kit has different jetting and cables from the XR650R, but uses the same TM40-6 pumper carb. Please see the link below:
http://www.nichecycle.com/ncs/categories/carburetor/carburetor-kits/ncs650l-honda-xr650l-tm40-mikuni-carburetor-kit-remote-choke.html
The additional jetting that comes with the Honda XR650r kit includes a 140, 142.5 and a 150 main jet, as well a 25 pilot jet.
We are currently jetting the carb with a 147.5 main jet, 22.5 pilot jet, Y-6 needle jet, and 9DJY01 needle.
Some fine tuning may be required. You will need to adjust the idle, and possibly the air mixture screw a bit. Here is a link to the manual for the carb: http://www.mikunipower.com/Manuals/HS40_Manual.pdf
We use a #40 accelerator pump nozzle in our XR650R kit. The stock TM40-6 uses a #70 nozzle. These nozzles are available in 35, 40, 45, 55 and 70. Below is a link to those nozzles on our website:
http://www.nichecycle.com/ncs/categories/carburetor/mikuni-parts-by-category/jettting-tuning/accelerator-pump-nozzle/tm36-43-accelerator-pump-nozzle-tm36-40-rs34-40-by-mikuni.html
If you ever feel your nozzle is putting out too much fuel, you can rotate the nozzle from shooting directly down the carburetor throat to banking the spray off the side of the mixing chamber. This has a similar effect to reducing the size of the jet.
We pre-jet them for sea level, but we also include extra jetting for higher altitudes that you will have to swap in yourself.
Yes we offer all jetting separately. Here are the pilot jets: http://www.nichecycle.com/ncs/categories/carburetor/mikuni-parts-by-category/jettting-tuning/pilot-jets/vm28-486-vm28-486-pilot-jet-by-mikuni.html and here are the mains: http://www.nichecycle.com/ncs/categories/carburetor/mikuni-parts-by-category/jettting-tuning/genuine-mikuni-main-jets/n100-604-n100-604-main-jet-by-mikuni.html here are the pump nozzles; http://www.nichecycle.com/ncs/categories/carburetor/mikuni-parts-by-category/jettting-tuning/accelerator-pump-nozzle/tm36-43-accelerator-pump-nozzle-tm36-40-rs34-40-by-mikuni.html
The fine tuning extra jets are:
Pilot: 25
Mains: 140, 142.5 and 150
We are not sure of any differences on Euro market XR650R. It is not something that we have dealt with in the past. We have shipped our kits all over the world, so if there were differences I have to imagine we would have heard about it by now. As for the elevation jetting, we can supply leaner jets for the altitude you ride at. When you go to sea lever, you will need to increase the size of the jetting. There is no additional cost for the change in jetting, but we cannot guarantee it will be perfect. We jet for sea lever, but can use a calculator to get it pretty close. Additional fine tuning jets will be included in case some additional adjustment is needed.
We know this kit will fit on stock bikes, but we have no way of testing all the aftermarket fuel tanks on the market. But a lot of folks are running aftermarket tanks with this carb kit. You may have to install the carb with the tank off, but I don't think you'll have a problem with the carb interfering with the tank.
As far as risers go, our cables are a bit longer than stock so it should work with 2" risers.
The remote choke is an excellent choice if you're running a larger aftermarket tank. It makes operating the choke a lot easier. Some folks attach them to the side cover, some make small, 90-degree brackets that are attached the frame. I suggest you put it where it works best for you.
http://www.nichecycle.com/ncs/mikuni/carb-kits/ncs238-honda-xr650r-tm40-carb-kit-remote-choke.html
We use 680 Loctite
Thanks for your question. An "uncorked" XR650 usually includes mods to both the air box and exhaust. Our carb kits come pre-jetted for stock to mildly-altered bikes. This would normally include what you have done to your bike. Your bike should run great with this carb kit in the pre-jetted configuration. However, depending or your exhaust or pipe mods, you might be able to use more fuel (larger jets) or because you ride at 2300' above sea level, it is possible you will need to lean the carb (smaller jets). Or, one may negate the other. That's why we ship this kit with a range of jetting so our customers can tune their bikes for maximum performance. If you need jets outside the range of what we include, you can bet we have what you need in stock. We carry one of the largest stocks of Mikuni parts in the US.
Thanks for purchasing this kit. As you get higher, the air gets thinner. To maintain a balance, you need to limit the amount of fuel entering the fuel/air mixture. If you kept the jetting where we set it, you would have a 135 main jet installed. If you were doing most of your riding at 6000 feet for a prolonged period, you would want to drop down to a 130 main. But if you're riding at sea level, going up to 6k and returning below 3500 feet in a day, you may want to stick with what you have. As the air gets leaner, the bike may act up a little, but this is real short term thing, so you may want to leave the jetting alone. Your air/mixture screw really applies primarily to idle engine speeds, so it won't help much except at minimal throttle input. However, if your idle is stumbling, you can certainly adjust the air/mixture screw to limit the amount of fuel in the air/fuel mix. If you find your bike is beginning to act up as you're riding in the mountains, a quick fix for your mid-range would be to remove the mixing chamber cap, pull out the throttle slide and raise the clip one notch to drop the needle a bit. This will limit fuel in the mid-range slightly - which is where you will probably be doing most of your riding. When you return to riding below 3500 feet, you can easily move the needle back.
There will be no clearance issues with our TM40 kit, running a stock XR650R tank.
Yes, this is a flat slide carburetor, equipped with an accelerator pump for unbeatable throttle response. We do not custom jet these, but we do pre-jet them to what we have found to work with the majority of bikes. We also include fine tuning jets for occasions where extreme altitude or extensive engine modifications come in to play.
By SND6 on 10/23/2018
Niche Cycle Supply had what I needed at a reasonable price and quick shipping. The Mikuni TM40 for my XR650R is just what it needed to perform. I had it ordered from another supplier for 3 weeks on backorder. Finally googled another supplier for the carb, and go figure. Niche had it in stock and for a better deal! Thank you NCS!
| Value | |
|---|---|
| Quality | |
| Price |
By Bernie78 on 7/7/2015
This is a very nice kit. I bought this body choke version, and installed it the day I received it. The bike runs fantastic. Its a good feeling to know its going to start on the first few kicks. Overall running performance is greatly improved. I ended up getting the parts from Niche to convert the body choke to a remote choke. Its not much of a difference, but I like it better.
| Price | |
|---|---|
| Value | |
| Quality |
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