Recent content by luckydevil

My #3 cylinder plug has an intermittent spark issue. Sometimes it won’t fire at all, sometimes it quits on me a mile into the ride and I limp home…doing the walk of shame past my dog. The same issue occurs when the ignition coil is switched, so it isn’t my plug wire or ignition coil. My plug...

Yeah, just one port. I put new valve shims in, but didn’t touch guides. Who knows how long it’s been causing problems. Looks like I need to go shopping. Thanks cliff!

I’m trying to get this 1978 XS750 running and I noticed burnt oil or residue from incomplete combustion in the cylinder #2 intake port. Cylinders #1 and #3 look nice and clean. I’ve attached photos for reference. I admittedly tried to run the bike with pretty nasty carbs before starting the...

Thanks to everyone for the input! It helped get me out of the mud. Any tips for idle speed screw setting just to get it idling? I'm using factory settings for jets and air/fuel mixture screw (backed out 1 1/4 turns). Also, does anyone know the tach gear ratio for a replacement? It looks like a...

I think I'm following you. I'm reading 13.9 ohms on all 3 coils. Spec says 7.9k ohms (+/- 20%), plus 5k = 12.9k. So I'm a little high, but within spec? Or am I all mixed up?

Holy cow! I had 2 of my plug wires criss-crossed...bonehead move. I got hung up on small details, missed a big one. Sprayed a little carb clearer and boom, fired away. I can't quit get it to idle, but it fires so long as I mash the starter down. Gives me something to work with. Thank You!!

I have fresh, ethanol-free gas, and I'm getting gas into my float bowls.

PO put manual petcocks on this tank, but I've been forgetful in the past. Now that you mention petckocks I bet air is getting through these cracked old caps over the petcock vacuum barbs. Thanks!

I checked compression with throttle closed. They're squeezing about 140psi with throttle wide open...thank you very much. The plugs are damp when I pull them out.

I'm attempting to bring my 1977 XS750 triple back to life. It started to run poorly (inconsistent idling and bogging down when rolling throttle), and then sat for a couple years. I was able to get it to fire up, but it was backfiring, stalling, and missing cylinder 2. I broke the carbs down and...