cam

Hey guys, I have been digging through a million posts and I am pretty stuck at this point. Im hoping one of you brilliant MFers can help me out. I bent an intake valve after swapping new plugs and not checking clearances.. yea.. learned that lesson. Anyway, I swapped that valve with a new...

Alright I need to do something. This 2-into-1 turnout I have sounds like absolute s***, and either the baffle is completely rotted, or it never had one to start with. Either way it’s not a serviceable part, so it’s junk. I’m thinking of going back to stock headers (Anyone got a relatively-clean...

Hey all. I was just wondering if the hughs handbuilt pma and electronic ignition would be a good choice compared to the vape ignition and pma kit. What are your thoughts? Also cutting and re welding the camshaft or grinding and rewelding them up. Opinions? Also, no offence to Hugh. Im just...

"Working From Home" has left me alone in a small room with my computer for more hours than I should be, and with a wife and kid running around the house.... let's just say looking at skinny girls is right out. So I dusted off a Windows98 virtual machine and an old copy of Dyno 2000 and started...

Hello, I just rebuilt my engine and replaced a fair number of parts, and I am now having an odd problem statically timing the spark. Known variables: I do not know when the last time the engine ran before I rebuilt it. I had Hugh's Handbuilt rebuild the crank, it is not rephased. I...

1978 xs650se. Her names Rose. Pamco ignition with e advancer. Pma and Reg/rec. removed old wiring and re wired. Removed safety relay and the two light relays. New dyno dual tower ignition coil. With new plugs and wires. New battery. New headlight. I don’t get it man. Could it be the Pamco/...

I have been re-assembling my bored, rephased XS650SJ. I have hit snag while degreeing the cam, and want to ask your advice. Background: Valve job, head re-surfacing, and boring (to 700) by Hoos. 447 crank and cam 277 rephased by Hugh's. New pistons, rings, cam chain, cam guides (both)...

It seems that I really screwed up on my CAM installation with my engine rebuild. After getting the engine back in the frame I was setting the valve clearances when I noticed that the valves did not seem to be opening and closing at the correct points. I thought we were being very careful...

If you want to read the conversation that precipitated this modification, it starts here. It's quiet the slog.... 'bout 10 pages... and I'm not gonna re-hash it all here. The short and sweet of it is that I... and others... feel that the Mikes XS chain guide is unacceptable. Either twomanyxs1b's...

Im sure it isnt a uncommon thing, i just cant find any video of people with a stock bore size XS and a shell#1. I see mostly 700s and 750s that are cammed. Im just trying to get a feel on how rowdy a stock bore XS with 250 /250 on 100 will act. Thoughts?

My stepson had the heads rebuilt and has not been able to get the old xs to fire since seems like it should be a timing issue to me.Any ideas this is my first go on these xs's

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 Just reassembled an XS1 engine and there seems to be a lot of slack on the back side of the timing chain. Before I installed the tensioner I was inspecting the chain and when I pushed on it, it moved until it was touching the lower/center chain guide. When I joined the cam chain both ends met...

Hi guys, my crank was rephrased by a local (at the time) moto engineer a couple of years ago. I asked him to do a right side advance same as most people seem to do. He was going to do a matching cam for me but ended up saying (after having the cam and crank a year) that he was unfortunately too...

And now, this week's mind-numbing, obsessive-compulsive, winter cabin-fever diversion: Yamaha XS650 Valve train, Rocker Arm and Adjuster Tip Geometry Geometries used in the motions of the Cam Lobes, Rockers, Adjusters and Valves in the stock XS650 Head For your pleasure, or anguish...

Hi all, gonna need some advice on this cam, its like the pin hole is cracked, tried to put a pin in it and it can move to the side because of the cracks, its from an engine i bought and wanted to put a big bore kit on. Is there any way to use this cam or is it to far gone. Thought about...

Hey guys, I'm looking for some photos of a 277 HHB rephased cam that show the timing marks. When installing the cam, I set the left piston at TDC and noticed that the timing pin on the right side end of the cam is around 1 o clock. I'm thinking my timing is off, but I'm trying to collect as...

Hi All, I am having some issues with my Cam Chain adjustment. Have owned my 1978 xs650 for two weeks, has it checked up with a mechanic before I purchased it and he gave me the usual list of maintenance issues that need to be taken care of on an older bike, but the general ok. Issue at...

Anyone have an idea on how much pressure needed to press off and on a cam gear? Will the small bench top 6 ton HF work? I guess it should since i read someone has heated one up and tapped the gear off and on with hammer pressure??? Anyone use and arbor press?

I'm working on timing the cam to the pistons. I know that both pistons move in unison but fire simultaneously so there's no question which piston should be TDC, but rather which cylinder should be in its compression stroke when the cam notch is upright. I first thought to assume it would be...