carburetors

I am trying to dial in my carbs to make them operate better. Bike idles great! No issues there. Bike even runs and rides down the road good. Current settings. PJ 32.5, MJ 140, NJ position 3. Running UNI pod filters and straight pipes. Current issue is bike bogs down at 1/2-WOT when RPMs are...

Hi all together ! I have recently completed the rebuild of a barn find. A 1981 US Custom. After putting a custom gas tank + petcock on the bike, I would like to know, if it is ok to seal off both vacuum outputs on the intake manifolds or rather connect them both with a tubing ??

can't seem to find a consistant size for a standard main jet in a 79 BS38 carb? Mike says 132.5 another seller says 135 ? What should it be and can someone please confirm that this is the correct part number YAMAHA-620-14231-99-A0...

ok i'm installing mikexs needles ( I know but they'er cheeper than 650 centrals ) and I think the install is the same the pic shows 2 clips on the needle is the 2nd one a spacer or are they showing that it a E clip,I don't remember doing this befoe and have done a few of bs34's

Hi there Japan XS650 79', 3G5, carburetor BS34, main jet 130, brass float, I can not find this setting the carburetor .... mixture screw? RPM?

I've been looking at the wise guy intakes and I like the side by side kit.....anyone know how much that one costs? With the carbs and everything. I checked the website and didn't see a price. Also how much trouble is it to get that kit on and running? Justin

At the end of May, I retired and now am able to work on my hoard of 650's. The 77 I bought from a fellow a couple years ago who had holed a piston on his first trip on the 401 freeway after putting around town for months. I bought a 750 kit from 650 Direct once it finally had them in stock...

I believe the connections screen right are for fuel, but the brass connection in front of it? Any help would be greatly appreciated. Tnks!

My bike runs great but seems to have a point when theres no acceration at all when throttle is cracked at 30 mph on up. Seems more of a problem when fully warmed. Im only 180 ibs so my weight shouldnt be the problem. Doesnt really matter what gear im in most noticable in 4th and 5th. There no...

finished experimenting with exhaust cans. settled on 17" x 1.750" ID Thrush perf core glasspacks, which sound good and perform great on custom 2 into 2 1.500" headers. fresh top end rebuild '73 motor with porting. using VM34's and have a rather vexing hesitation at approx 1/8 to 1/4 throttle...

Hey, I have an 81 650xs that definitely does not have 81 carbs. Each carb has a throttle cable that goes to throttle assembly. Are these Solexs? I'm trying to get rid of the old beat up dual throttle assembly. Does anyone know if the TC Brother Choppers XS650 2 into 1 Throttle Cable for...

I've been toying with my motor and my carbs. Everything is in great condition. I've put new jets in the carbs, Cleared out the everything. Checked and tolerenced the valves, played with the timing to fine tune it, and everything is on a new build. I just went for a ride this morning after...

SOLOVED!. BS34 Choke (Enricher) not raising RPMs ? Hello folks. I have an interesting situation with a pair of BS34 carbs. My '83 year model had a pair of earlier BS34's on it with the hand type choke that I used to learn a bit about tuning, jetting and synchronizing. Ran fantastic with...

Hi There. I am having trouble tuning my flatslide carbs. They are Mikuni TM36's with fuel accelerator. But I can't find a manual that describes the exact model. There seem to be no air screw other that i single screw under the float bowls. Can anyone help me identify the exact model and maybe...

Well I finally got the bike up and running, but not without some trouble of course. I can seem to get the timing to relax. I am running a SPARX and a Boyer Branson ignition and it starts and I ken get the idle to be okay, but as soon as I hit the throttle it jumps way higher in RPM and won't...

I am just at the end of my first bobber build:thumbsup: I have read many topics on the issue i am having and cant quite find the solution. My bike is a 1981 running standard engine spec with the exception of open ended pipes, and GPZ 500 keihin 34mm carbs and electrex world STK-467D CDI...

Hi all , I have a 74 xs 650 on standard carbs. Its been off the road for 3 months but now its back its making a squeeking noise from the carbs. I have traced it to the choke as when I apply it the noise stops ( mind you so does the motor if its hot). Not being familiar with anything other...

Hey, I put some BS34's and manifolds on my '72 650 motor in my build (t-t-t-t-t-tight fit) and they look crooked as SIN (they are cocked up in the back). I'm wondering if I have the manifolds wrong (like upside down or reversed or both)? right now, they are sitting with the vac ports pointed...

I'm reaching my wit's end, and any and all advice would be welcome. I've got an '81 Special II, it's all stock, with BS34s, and I can't get it to stop with the popping. I pulled the carbs and did as best a disassemble and clean as best as I could. I replaced the mixture screw o rings and both...

Can't locate NOS. Has anyone used these? Good? Bad? In-between? http://www.ebay.com/itm/YAMAHA-75-79-XS-650-CARB-FLOAT-BOWL-GASKETS-YM-604-2-/220820649941?hash=item3369efb7d5&vxp=mtr Worse comes to worse I'll cut my own, but for $7 I thought I'd ask. TIA