Converting the XT to a single carb setup, possible?
 

is it possible, without extensive modification to put a single carb on an XT600? or better yet, is there a set of traditional CV carbs that can be directly bolted on in place of the setup I have?

I dont much care for the design of the current carbs, but beyond those, this bike is GREAT to me.

I’m curious, why don’t you like the stock carbs?

I recall reading somewhere about a guy trying to make the carburetors from a Kawasaki ninja 250 work. I don’t remember if the post was here or somewhere else. Maybe you can bing/google it. There ninja has two carbs (not one) but the design is really simple.

The little ninja was a huge seller for years, carburetors should be easy to find and cheap.

I "binged" and found this:

tt600 carbs - ThumperTalk

I looked at the 250's carbs, nd thought about that, if I'm not mistaken they're a smaller bore though, which would detract power.

what I was looking at, and considering is XT660 or Raptor carbs, since its a VERY similar motor, and I'm 99% sure the spacing is the same. from the looks of things, they my even pop righ into my current intake manifold easily.


the stock carbs on my 84, are well, to me just not well designed. I DO NOT like having a CV and slide carb combo. especially not with how its designed.

newer regular CV carbs just seem much better. those I actually know how to tune easily.

bob i fitted ccm carbs to mine the spacing is pretty close and does need a slight bit of tweeking but they make a hell of a difference.

ccm? could you provide me a little more info on those please?

ccm or freewind carbs basicly the suzuki engined ccm carbs are the best as they are bigger jets for a start off so are a straight swap jetting wise and its the stubb rubbers that need a bit of a tweek to get them to seal properly.

How much gain in performance is there in fitting those ccm carbs?......cheers

I didnt see a single carb conversion, although I did see a dual Mikuni setup, which I may think about. I bet I could make a set of GS500 carburetors do the job if I tried, which isnt hard really.

keny its not a huge increase in power its more about how it delivers it:thumbup1: the motor is more responsive throughout the rev range and gives it a bit more at the top end where the old carb just seemed to be at its limits:(


bob the ccm carbs are a dual Mikuni bsr32's setup which means they are both slightly bigger than the larger bore of the standard carb:cool4:

I've also heard that the 660 Grizzly 2into1 manifold & carb is a straight swap....:mchappy:

You guys.... how about searching? :eek2:

It's here, look:

http://img267.imageshack.us/img267/1443/dsc02787y.jpg

1 - My very own 1990 XT600E engine
2 - Mikuni BST40 single carburetor
3 - Grizzly 660 JOINT, CARBURETOR part number: 5KM-13596-00-00

Yes, it's possible.
As far as the extensive modification I'll try to put a picture here when I get back home in two weeks.

Vando :cool4:

yes it will bolt straight on but the grizzly manifold is straight and does not have the rear shock in the way so there is a major issue with clearances you need a manifold that is angled so you can fit the carb at 45 degrees to the engine like the DR's single carb set up
what you probably cant see clearly in vando's pic is the rear shock is at least 3" from where it should be so its compromised all the suspention geometry

Yup, Wolf is right and I was too thickheaded thinking I could solve anything..

Even with the angled manifold you'll probably gonna have a problem with the throttle cables' orientation unless you figure out something engineous to make them able to work well I guess...

Anyway, my bike geometry didn't change that much because of the YZ front suspension.

But still, It's up to ya :cool4:
Hope you make it work!


Vando :smartass:

the throtle cable should be fine as there is plenty of flex in it.

btw suspension height and geometry are two seperate things the more vertical the rear shock is to the pivot point of the swingarm has an affect on the preload aswell as the response of the damper, ok we are talking about the soft suspention on an off road bike not a race bike but it should not be dismissed easily.

Wolf.. Guess you skipped my mod thread post... I bought the raptor carbs so I could fit the rear shock back in place but will make a spacer like the one Jens has, which he bought off ebay, on his black XT600E that makes the rear higher...

I wanted to keep the single carb that's for sure but I'll have to settle for the 2nd best...

;)

Yuo gues who was swapped carbs, please give os more info, so others can follow.

Which bike did they come from (make, model and so on), which jetting did you use, and how much was in the need of beeing modified, and how much?

Thanks a ton.

vando i know about your mod post, i was refering to the re position to make the grizzly single carb work on a xt600. which is what this thread is about and to enlighten anyone to the fact that doing the mod in your pic on this! thread that it will affect the way the suspention works.
as i'm currently working on a redesign to the set up on one of my other projects which will alter geometry i do know what a difference shock and linkage angles make