Keihin FCR 35mm and Mikuni 36mm Pumper Carb?
#11
05-07-2009, 02:07 AM
IMHO, if you are not very experienced in the "magic" of carburation, I would suggest that the Mikuni from Bill Blus is a safer option. That's the way I went and I am very happy with the result.
If you are prepared to do a bit more work and have the knowledge and patience, have a go at an FCR.
Either way there is plenty of information and help right here.
Starting from scratch right now I would go 351 kit, Mikuni.
If you are prepared to do a bit more work and have the knowledge and patience, have a go at an FCR.
Either way there is plenty of information and help right here.
Starting from scratch right now I would go 351 kit, Mikuni.
#12
05-07-2009, 03:04 AM
Join Date: Mar 2006
Location: East Texas, USA
Posts: 698
Yes, that's what I'm thinking. The Mikuni seems to be a little easier to work with. With a 351cc kit, either carb would work out to be a good match. Decisions, decisions, ...
#13
05-08-2009, 12:25 AM
I like my FCR, easy install....jetting was a challange but fun
If you can find a used fcr get it.....just check the slide rollers first
#14
11-30-2012, 06:49 PM
Mustang,
I just purchased a stock 2007 KLX300R and want to change the carb due to the throttle hesitation. There is a TM36-68 on ebay item number 170616515481. Is this the TM36 you are speaking of? Thanks
I just purchased a stock 2007 KLX300R and want to change the carb due to the throttle hesitation. There is a TM36-68 on ebay item number 170616515481. Is this the TM36 you are speaking of? Thanks
I have no direct experience with the FCR 35. Everyone who installs one swears by it, but that's all I know.
That being said, I can tell you why I went with a TM36. First off, price. An FCR from Four Stroke Works runs $600 +, a TM36 can be had for less than $300.00 if you shop around. Second is fitment. The FCR needs to have adapters front and rear to fit the KLX (hence it's hefty price), while the TM36 is a drop-in. Finally, familiarity and simplicity. I already had a bunch of Mikuni jets and had jetted many of them. There are less jets to changed on the TM36 compared to the FCR, which makes it simpler to jet. The accelerator pump comes with adjustable starting and stopping points, eliminating the need for the "taffy mod". On the other hand, the full range of adjustment the FCR offers might be what makes it better (albeit harder to jet). Again, I don't know.
With a TM36, you ditch the "push" cable and only run the "pull" cable. There are no frame modifications needed. You may need to slide the boot on the airbox side of the carb forward about an 1/8 inch because the TM36 is about 1/4 inch shorter front-to-rear than the stock CVK carb. This is actually a blessing because it is much easier to get the carb in and out. You will probably want to take the lid off the airbox, even with a stock motor. Some guys run the TM36 with stock jetting and a stock motor and are happy. I've only run mine on a 340, so I don't know how it runs on a stock motor. With the some mods (exhaust, big-bore kit, etc.), the carb will add some power in that it will allow the engine to breath better. In any case, a pumper carb will vastly improve throttle response.
That being said, I can tell you why I went with a TM36. First off, price. An FCR from Four Stroke Works runs $600 +, a TM36 can be had for less than $300.00 if you shop around. Second is fitment. The FCR needs to have adapters front and rear to fit the KLX (hence it's hefty price), while the TM36 is a drop-in. Finally, familiarity and simplicity. I already had a bunch of Mikuni jets and had jetted many of them. There are less jets to changed on the TM36 compared to the FCR, which makes it simpler to jet. The accelerator pump comes with adjustable starting and stopping points, eliminating the need for the "taffy mod". On the other hand, the full range of adjustment the FCR offers might be what makes it better (albeit harder to jet). Again, I don't know.
With a TM36, you ditch the "push" cable and only run the "pull" cable. There are no frame modifications needed. You may need to slide the boot on the airbox side of the carb forward about an 1/8 inch because the TM36 is about 1/4 inch shorter front-to-rear than the stock CVK carb. This is actually a blessing because it is much easier to get the carb in and out. You will probably want to take the lid off the airbox, even with a stock motor. Some guys run the TM36 with stock jetting and a stock motor and are happy. I've only run mine on a 340, so I don't know how it runs on a stock motor. With the some mods (exhaust, big-bore kit, etc.), the carb will add some power in that it will allow the engine to breath better. In any case, a pumper carb will vastly improve throttle response.
#15
11-30-2012, 07:33 PM
From Niche Supply for $269.99 shipped? I do believe that is the one. I plan on getting one of these myself. That's a good price from what I've been told.
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