37mm FCR carb differences???

['00 WO-YA!]

Ok guys, I know carbs are beaten to death, however there are some questions that I have about the FCR 37, sorry! I've been lookin on ebay & it appears that these things came of 250F YZ's & CR's. Does anyone know if they're the same carb exactly? It looks like they are but I didn't know if the hookups were different from one to the other so is one carb prefferable over the other for the retrofit? Also, I'm figuring on needing the Rappy 350 intake boot & tube to go to the airbox, correct? What about the throttle hookup? Do I have to use the twist throttle or is there another setup? I want it to work right & not be a hack-job install, I want it to look/work like it came on a Warrior. Thanks-James

 

[beastlywarrior228]

their the same but youd be the first to use it. its made to be used with a twist throttle but you might be able to modify it for thumb

 

[headache]

i'm sure theres a thumb throttle cable somewhere that would work, probably could us a honda 450r cable as they have a fcr carb also.

 

['00 WO-YA!]

Any of you guys ever tried a twist throttle on a quad? To me the thought of it just seems wierd. Will the twist go right on my bars w/o any issues? I prefer the thumb throttle but I guess I could get used to a twist.

 

[jgray44]

i think having a twist is a little to dangerous on a quad. going over bumps and what not your wrists tend to take a beating and you could goose it by accident and end up in a tree. just my 2 cents tho.

 

['00 WO-YA!]

I would have to agree with that possibility man. If I did it I'd want the twist to be a temporary solution til I could figure out a thumb setup. I'm sure some guys love it though.

 

['00 WO-YA!]

I also wanted to try to seperate these carbs from the Rappy/Z400 carbs. I'm sure some of the stuff to make it work are the same but I think some folks may think, they're the same carbs & they aren't.

 

[duneracerweston]

I don't think you gonna ned the rappy airbox boot you just heat and oversize the stocker and I've a twist/thumb throught you pull a pin and it switches from one to the other and let me tell you if your not used to a twist already DON'T DO A TWIST THROUTTLE THAT SHYT IS DANGERIOUS!!!!!! I hade mine get away from me more then once because I was using a twist

 

['00 WO-YA!]

I don't think you gonna ned the rappy airbox boot you just heat and oversize the stocker and I've a twist/thumb throught you pull a pin and it switches from one to the other and let me tell you if your not used to a twist already DON'T DO A TWIST THROUTTLE THAT SHYT IS DANGERIOUS!!!!!! I hade mine get away from me more then once because I was using a twist

Thanks, so it just swaps right over? I thought you had a 38mm mikuni Weston?

 

[duneracerweston]

I do but I've messed with the rappy airbx and there's noway that that boot from the air box to the carb would line up with that setup running a warrior air box

 

['00 WO-YA!]

So use my boot & airbox with the FCR then right? Getting the boot to swell shouldn't be a problem, I've had good luck with dipping stubborn stuff in boiling water for a short period. It'll usually cooperate after that, lol! I still don't quite understand what you were saying about swapping the throttles over though? Did you mean that I should be able to pull a pin at the cable end & just remove the twist throttle & reinstall the thumb???

 

[duneracerweston]

Idk about how to switch yours over my thumb throuttle itself as in the housing on the bars dose that not the carb or cable

 

['00 WO-YA!]

Hmmm, I'm gonna have to see about searching a lil more. I have seen a lil bit online about putting an FCR on a Z400, maybe I can figure what I need to do by what those cats are doing.

 

[jgray44]

i plan on getting an FCR for my z. cant wait till i do!

 

['00 WO-YA!]

Have you found any good info on the install?

 

['00 WO-YA!]

I swear guys, I search & search the web for hours sometimes(watchin football too, lol) & I get so pissed about the lack of available info for some stuff. This subject seems to be one of those that I just can't find what I'm looking for on! I did find that the YFZ450's as well as some other 450 quads use a larger FCR so maybe a thumb throttle & cables from a 450 Yammy would work for this thing but I have no way to confirm Nobody here has one of these carbs on their Warrior or Rappy? It's so frustrating that I'm considering a Keihin 38mm PE kit that Dennis Kirk sells, hopefully that would remove the guesswork, idk. The DK kit lists to fit a Warrior from 87-04, I hope it's complete. Anyway, I hope nobody thinks I'm a PITA sometimes when I try to be thorough, basically I'm just trying to make sure that info is complete & accurate for the next person that happens to Google a subject ya know.

 

['00 WO-YA!]

I swear guys, I search & search the web for hours sometimes(watchin football too, lol) & I get so pissed about the lack of available info for some stuff. This subject seems to be one of those that I just can't find what I'm looking for on! I did find that the YFZ450's as well as some other 450 quads use a larger FCR so maybe a thumb throttle & cables from a 450 Yammy would work for this thing but I have no way to confirm Nobody here has one of these carbs on their Warrior or Rappy? It's so frustrating that I'm considering a Keihin 38mm PE kit that Dennis Kirk sells!

 

[beastlywarrior228]

yep the yfz and newer trx use a 39mm fcr which im contemplating using for my 446. maybe try getting a 37mm and try to fabricate something so you can use a thumb

 

[duneracerweston]

A 39mm is a good size carb run one of those! I bet it would do really we with a 366 I know my 38mm runs awsom on a 353

 

['00 WO-YA!]

I might look into the 39mm, sorry bout the double post btw, not sure what happened there, lol! Anyway, I think the 39mm FCR might give up a lil on the bottom but would prolly scream through the mid to top!