engine

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...

I have the chance to get their hands on a very clean xj650 maxim for a really low price . But before avanturer , I would like to know what are the differences between XS650 and xj650 ? and secondly if it is as easy to find parts for xj650 maxim 1980 and to customize it? thank you

Hi guys, Bike has done like 20.000 miles. All new point ignition. new plugs, leads, caps, coils checked, igintion spot on, dwell angle spot on etc. 120 psi on both cylinders, carbs fully rebuilt with all new diaphrams, jets, needles etc. synced with vacum. All engine related wirings are new...

How difficult is it to remove? Can I pry it out with a pick tool or screwdriver? I have a '75 B and it has one side of the breather plugged and the other routed down to the sprocket cover as a chain oiler. Works, but messy. I have a pair of '78 air boxes that route the breather to the...

allmost finished my rebuild and think i might have put cylinder studs in upside down :banghead:the rounded end goes up think i put the rounded end down do i have to take this apart or is there not that much difference?

I have an '82 special that has a nagging oil leak from the 6 bolt cover that houses that cam chain tension adjuster. The leak appears to be coming from the top right 2 bolts. I've tried a new gasket, but I think the issue is that I can't crank down hard enough on the bolts. I got new bolts as...

Hey all, I just had a guy swap out my clutch (because I'm completely inept mechanically) and when he got done there was a helluva sound that's progressively gotten worse. I've attached a sound clip. What could it be? I took it to a shop and they told me I'm looking at $1000+ just to tear it down...

Okay guys I could really use some help here. I have a 1980 g series, and about a month ago I decided to do a top end rebuild, ( this is my first ever experience with something like it.) While doing so I decided to get a valve job done, bored out cyclinders, new hoos racing 700 cc JE pistons, and...

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...

Ok y'all, this issue has been getting worse, and I have tried all I can think of so I'm looking for some help or ideas into why this damn thing is running so poorly. Specs: 1979 XS650 BS 38 carbs PMA Pamco Simplified wiring harness with blade fuses Problem: Video link here - Sorry for...

I got this bike a couple months ago and am almost done. Finally got it running, but when I got it the PO said I would need to fix the bendix gear and even provided me with a new one from MikesXS (even though it failed immediately). That is not important though. What is important is that now it...

Recently I checked my oil pan that I use for draining all my vehicles and I found two copper washers and part of a piston ring. I wish my catcher was not so open so I had an idea of where/when they came out. I wanted to hear what stories you guys had. Pictures are great. Ps. Where do we even...

I have this threaded hole on top of crank case don't know what goes in it. It's the hole with the green rag in it

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 know this topic is discussed at length in other threads, how to properly seal the base gasket on these engines. However through my searching and reading through the threads I haven't been able to get a clear answer on this particular question. I've purchased the heiden tuning complete 750 kit...

Looks like I may have created myself a problem here. When I started rebuilding my engine I planned on leaving it stock, I ordered this pamco ignition kit from mikes https://www.mikesxs.net/product/14-0917.html Down the road a bit I decided to send my crank to Hugh for a rephase. Now my...

I'm replacing the top engine mount on my bobber with a 78 engine due to the original mount tab breaking off the frame. I wanted to go with the one piece mount but on my bike the rear part of the one piece doesn't clear the frame. Does anyone know of a one piece mount that has only a single mount...

I got a 81 xs650 that I took apart and painted the motor and frame. When I put it back together it was was running fine. I was having charging issues so I replace the rectifier/voltage, alternator rotor and stator bushings. Now the bike is back firing and running rough. I'm getting 14 volts...

Hi there gents. Bike was starting beautifully and then suddenly starter just spins. In the 'oh oh' album I've posted a pic of a gear on the left side of the motor which just spins freely and can be moved back and forth maybe 10mm. Is this normal? Or do I just need a mikes starter...

So I was trying to solve the usual left side cover leak. I figured it was the pushrod seal so I replaced that, but the leak persisted. After pulling the cover off again I realized it was coming from the sprocket. The sprocket was super loose so I tighten it up and put the cover back on. I took...