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All be damn'd, I've heard of rare finds but who would'a thunk pistons. Leaving these untouched for sure. I'll be looking to sell after I do some research and learn a bit more about them.

I'm no machinist but my trusty calipers tell me: piston - 79.90mm bore - 79.94mm

Thanks everyone, I will certainly call them all. Here's my thread on the pistons I'm looking to modify.

Yep cc'd the head and cylinder with guidance from grizld1. Wouldn't doubt my numbers may be off a bit so I made sure to go through everything a few times. After my third cc measurement came near the first two I was pretty confidant with the results.

My 77'D has a fresh rebuild from previous owner. When I got it all I had left was tuning carbs, paint and few miscellaneous things to finish. While getting help from members here about my carb issues it soon lead me to check my compression. It was off the chart at 240 psi both sides. I had no...

Thanks for suggestion, Napa declined. Said they're not setup for this type of work.

Can anyone from the Portland OR area recommend a machine shop to mill some pistons? SE area preferred but will look at any. I need to bring my compression ratio down a bit. Thanks

Side covers and fender came today, they're in great condition! Thanks.

Sorry about that pm, how much for a complete head assembly?

I'm looking for decent 77' rear fender and side covers.

pm sent...........

5twins the needle jet is 159 P5 Ordered the jets suggested in the guide. While waiting for order to arrive I wanted to see where my compression was at. This leads me to a question of high compression and is it related to carb issues or not. Does a high compression engine have an impact on jet...

I'll take the red side covers. Are they still available? Price? Sending PM.

I've been following this guide http://www.amckayltd.com/VM34-36.pdf step by step, but I wanted to see how the bike ran with what jets I have on hand. My original question of what would cause the right carb to act different from the left is obviously premature without the proper jetting. No...

Thanks I'll check the air jet and see if that helps. Haven't got the chance to work with mains yet, wanted to get the idle circuit worked out.

hotdog, as mentioned in my first post I set both of the lift slides using a drill bit. They both lift at the same time. And yes I should and will follow up with manometer. But when performing dead cylinder test the engine is only running one carb at a time so I'm not sure how synchronizing...

I synched on the first go around with the richer jets. But when I changed the jets I know I have to start the process over again by performing dead cylinder method on both carbs then sync using a manometer. If I can get that right side carb to hold an idle my next step is to sync.

Trying to dial in carbs using dead cylinder method. For some reason the right carb seems to not cooperate. Background: this is a rebuilt engine with Mikuni VM34-168 carbs (using remote fuel bottle) When I started tuning carbs the bike idled good, but was smoky appeared super rich. Checked the...

Sign me up, my tuning capabilities sure could use the local support. Btw, I was curious why I didn't get one of your pm's, so I searched for myself using the key word Oregon and had no luck. Then checked my profile and figured out why I was not being found using the search tool. Under...