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I have some stock 1977 XS400 parts that I'm trying to sell. Took all these parts off so I could replace them with new parts, but they were all working and functional before I took them off. All wires to electrical parts were cut off so there are still colored wires coming off parts for...

Not 1850psi on the left side. I might have an engine grenade if that was the case

Re-checked compression tonight and did a wet test. 140psi left side, 150psi right side on the dry test. 1850psi left side, 200psi right side on wet test. So, I dont think the rings is the culprit on why it's running bad under pressure. The carbs have been cleaned and timing has been set and...

The engine starts and isles fine completely cold. It will sit there and idle all day, but if I try and ride it and get it into 2nd or 3rd gear (or put any strain on the engine with higher RPM's), the bike doesn't want to idle after I do that. Going to the shop Wednesday to hopefully find the culprit

Im thinking that the bike just needs new rings and a hone. I mean, stock internals on a 1977, I can see how they would be past due. Haha

When doing the compression test, I did a dry test and used the electric starter, turning it over about 5 or 6 times. I borrow the compression tool, so I didn't try the wet test to see if the rings were bad. I'll see if I can borrow it tomorrow and try it. I looked at my coils when I did my...

Did a compression test and both checked in at 100psi. I know that's low, but could that be an explanation of why my spark plugs are so different after I run it?

Re-timed the bike. Left side was a little off, right side was spot on. Rode it down the road again, and its still doing the sputtering thing. Had it in 6th gear pinned and was only doing 60mph. Looked at the spark plugs, left side was black and a little wet, right side was like tan/white and dry

NEED SOME HELP! I rejetted my bike, went 1 up on the main, and 1 up on the pilot jet. Also fixed my pilot screw for the A/F mixture at idle, BUT IT'S STILL BOGGING DOWN! It will start up with full choke, warm up, I take it off choke, then it will idle for like 30 seconds and then die. I rode it...

Does anyone have a link where I can buy one of the air/fuel mixture screws? I have a '77 XS400 also. Thanks for all the help guys, I appreciate it. When I get all the parts and get it back assembled, I'll definitely clarify what seemed to be the problem

I took the carbs apart today. Everything looks alright, but the Air/Fuel mixture screw in the left carb is broken off. The tip is stuck down where it is barely visible, but it is stuck where I can't dislodge it. I don't feel like that would be my bike issue, because it has probably always been...

I already ordered new plugs. 45 pilot, and a 140 and 145 main jet to kinda trial-and-error on which one works best. It's just weird how it started up fine this morning and idled perfectly, but it wouldn't even do that yesterday. I'm just still stumped that it will start up and idle fine, I'll...

Here are a picture of the plugs. First picture is of the plug that I rode about 55 miles on. The 2nd picture is of the one step hotter plug I got and rode about 4 miles on. Also started up the bike this morning and it idled fine, and reeved up fine. Didn't act like anything was wrong, but I...

Hey everyone, I need some assistance. Here is the backstory: I rode the bike 55 miles 8 days ago. Ran perfectly fine, other than it backfiring quite a bit when I let off the throttle. Started the bike 5 days ago and let it idle, started and idled perfectly fine too. All that I have done to...

Also on the handlebar control unit, it has a T/S MAIN WIRE and a H/L MAIN WIRE. What could those even be? http://www.dimecitycycles.com/vintage-cafe-racer-caferacer-bobber-brat-chopper-custom-motorcycle-electronic-handlebar-parts-black-headlight-blinker-control-killswitch-12-0041.html Here...

Thanks for the response! The headlight is already grounded (there are only 3 wires off the headlight.) Do you happen to know if the blue/black wire is constant power? This is kinda hard to explain. Haha. But when I took apart the high/low beam switch, it had a toggle switch that would seperate...

I need some help on wiring. I have a 1977 XS400 and I bought a left side handlebar control that has the blinker control, horn, and High/Low beam switch from DimeCityCycles. I wired up the headlight, yellow wire, green, and black, but the light isn't coming on. I noticed that when I took apart...