carburetors

I have a 1976 xs650 needs a lot of work. The kick start lever has no resistance when trying to kick it. Also no compression from cylinders when kicking it. Electric start works and gives compression. Is this a problem? I have no chain on it because I just got it running mostly... (it's doesn't...

What is the correct setting for the idle mixture screw on a stock '75 XS650B? The owners manual that came with the bike said 13/4 turns out. That can't be right, it run like crap at that.

Hello, I have a 1980 xs650. The problem I am having is that it will fire up first kick or with the electric start but even a slight turn of the throttle and the engine dies right away. If left to idle it will run for about one minute and sounds healthy. There is a vacuum tube of some sort coming...

Got a '80 with the bs34 carbs, brass floats. originally set them to 27.3mm, went through carb tuning procedure outlined here: http://www.factorypro.com/tech/tech_tuning_procedures/tuning_carbtune,CV,lower_rpm_engines.html running 132.5 main jets, giving me good pull at >2500 rpms...

Im running a set of 34s and because of the frame location and length of the mounts I cannot run the regular Uni filters I want. I was thinking about covering the intake with some bulk filter material or at least a fine brass screen, however I am not sure if that will jack up the airflow being so...

hello yall im new here and just got my first xs been along time coming. I have 2 ? first is my idle screw on the left carb is stripped and I need to know the thread size. to get a new one. might have to drill out and retap bigger unless someone else know a different way to fix it ? 2 bike...

One of my mikuni BS38's is leaking fuel from the float bowl drain. The aluminum washer seems to be the culprit. I have been unable to locate one of these and even thought that a copper one might work, but I can't find any of these either. Any suggestions? Thanks.

I need a float bowl from a '74/'75 XS650. Must have "H" stamped on the bottom. If anybody has an extra please PM me. Thanks!

I going to have to buy a right side carb for my 1975 XS650 how can I find out for sure which model they are. BS38 or 34 Thanks...

After plenty of hassle and struggle with my stock bs34s I've given up and decided to buy the mikuni vm34s offered on mikesxs. But what I was wondering was if anyone knew what else I would need ( other then part number 48-8102, and 48-8103) to run them on my 81 650? I know that I can run the...

1976 XS650C. Starts/runs great. Burns no oil. Under 8,000 miles, if odometer and PO are correct. Cam chain tension good. Valves adjusted good (003 and 006). Compression with warm engine and wide open throttle is 145 right cylinder and 140 left. I built a manometer last week and used it...

I'm haveing trouble with my "new to me" 1975 XS650. When I bought it the right cylinder would not idle. It would kick in arould 2500 rpms and run ok, but when just cruising at 50 mph or less the right side would just kind of gurgle. Under power it ran good. Me and a very experienced mechanic...

I'm attempting to install the freshly cleaned carbs onto my basket case bike and discovered that the after-market manual that I have doesn't show the 75 carb linkage (apparently only later bikes mattered). Unlike later years of the XS650, the carbs dont have a mechanical linkage to keep them in...

so i have the thing idling fine. when i give i rev it up the thing sometimes randomly dies. and im not talking it sputters or slowly dies. it just dies. when it does this i will go to kick start it again and it wont fire up. its almost as if someone were to shut the thing off by the key or it...

hi guys well i,ve pulled my cv38 carbys off the bike ,,, and at the moment its misserable ,cold and soaking wet,, so nothing been happening at this time,, i also pulled both boots off the motor ,,,,the right boot under the sheet metal shroud they have ,,had a small hole i think through old age...

Fellers I have never had so much trouble, and some weird stuff going on. Recent PMA failure led to reg-rec blowing and battery fry-up. So, Fixed it, and I'm on borrowed 3-phase reg-rec until Hugh's replacement gets here. While all that was going on I tinkered with everything trying to...

My tank only has a single fuel line running to both carbs, saw this the other day and was kinda curious as to why it has two lines? (as in i have 1 petcock the tank in the image has 2)

alright, when i bought the bike it included some old uni filters on it that were starting to deteriorate. I went ahead and pulled the float bowls to check the current size of the jets and discovered that my main jet was a 127.5 and my pilot jet was a 40..... from what I can tell is the...

Hello all! My name is Jesse and I have just recently picked up my first motorcycle, an xs650, of course. I have a lot to learn, and hope I'm not wasting all of you guy's time with these questions. Here is my situation: I have cleaned my carburetors by dissembling and soaking the full...

Here's a question for all engine guys, see if you can help me. After not using my bike for a few weeks I've now got a very peculiar problem I've not heard of before and my bike mechanic friend is lost on too. The bike starts first time and idles perfect when on it it's side stand (leaning over...