carb setup

Hi All, I am based in the midlands and have a bit of a basket case xs250 1978 SE. I am wondering if anyone has any main jets at all please? I am after #125 main jets as I am running an aftermarket exhaust but with stock air filters. I could be wrong with this size if anyone has any experience...

I have a 1978 XS400E all original. The problem is that when the engine is hot, it will not idle down unless i use the brake. I can be cruising along and take my hand off the throttle and it will stay at speed until I brake. Then the engine will slow down. And often waiting at a stoplight it...

Hello all again, I have still been working over my recently acquired 1978 XS400E and thought I'd post an update on all the things I've done so far. 1. As in a previous post, I had a cracked head. I bought a used one off ebay, lapped in the valves, new valve guide seals and also decided to...

So, I got into the carbs on my ‘81 the other day and honestly the worst I’ve ever seen. Gonna be completely rebuilding them. I am having trouble locating floats for the ‘81. Will the ones from earlier models like 77-79 work? I uploaded some pics of what I got versus what I was looking at buying.

A few months ago I purchased a 1977 Yamaha xs360. The bike was in a very rough condition when I bought it so i spent these last months rebuilding nearly everything. I'm running stock-ish (not open) exhausts and the original carbs with pod filters. I replaced the #130 main jet with a #135 to...

1979 xs400F So I am now TRYING to get the carbs sync. Once I let the bike idle/warm up and shut off the choke, the bike takes off/over rev's. New battery-good charge New coils-Both primary's and secondary's checked out on install. Going to chack again Electronic Ignition! Valve spacing has...

I have a problem that my bike doesn't want to go any faster than 45 maybe even 50. I have stock jets still and I'm not sure if that means much. When I screw out my fuel mixture screws nothing happens. I already cleaned my carbs. It is also sometimes difficult to start.

Hey new to the site just pick up a bobber project 78 xs400 but I was only able to find 81 xs400 carbs just seeing if anybody knows jet sizes recommended to use from past experience or any other advice, I also live at sea level if that matters thanks.

I recently finished (well got to a ridable point) my xs400 hardtail and I am having carb issues. It will usually fire up in one to three kicks with the choke fully engaged and as it is warming the idle steadily climbs. When I disengage the choke it nearly dies without some throttle and has to...