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Hello friends,

I am looking for the timing specification for a 1971 Yamaha At1.

I'm installed a new vape system and set the piston to 1.8 btdc.

I installed the base plate and made sure that the bolts were in the middle of the slots, then I installed the flywheel and matched the timing mark on it with the base plate timing mark.

Now my question is once everything is installed and aligned, how do you verify that the timing is not too advanced or retarded seeing as there is no external timing marks/pointer to reference with a timing light, besides the one on the flywheel and the base plate? Thoughts?

Hello fellow 2t nerds. I need a little bit of help identifying the carb that is on this motorcycle. I ordered a carb kit for it based off the year/model bike and it does not at all fit the carb that is currently on the bike. Attached are the pictures of the carb. If anyone can help I would greatly appreciate it. Thank you!

Anyone's ever used these?

https://youtu.be/JO56Lxh09_M

Hi fellow 2 stroke friends. I am moving from Savannah, Ga to Denver CO and I am a little worried about how the bike is going to run at that elevation. I would assume that the oxygen density is lower in Denver than in Savannah due to the elevation. Therefore the bike would be a little fat/rich for its new environment. The doubt that I have is will I have to change the jetting? We already run the carbs on the leanest clip setting on the tm34's. So all I can really change is the pilot and the main. Curious how you guys go about adjusting carbs when running them at a higher elevation.

Any tips or tricks would be greatly appreciated.

Also since I am moving to the other side of the country, Chuck will no longer be able to assist me on maintaining the bike. Besides logging miles, and top end noise is there any other way to know/measure when new pistons are required? Might be a dumb question, but I was curious if there was a was a way to measure wear or any tips/tricks.
Because If I have to visually inspect the pistons, then ill just send the jugs off to be bored, and order up a new set of pistons. Not that the bike needs a top end rebuild currently but I want to prepare myself for when that time comes.

Any solid engine builders near CO? Only 2 that I know of that are still doing work is Garret, and SCR? I'm open to other recommendations.

Thank you.

What chemicals do you guys suggest to clean the read of these bikes off? My swingarm and rear wheel is covered in oil/dirt. Any recommendations to make cleaning a little easier? Because car was soap ain't doing it lol

https://www.instagram.com/p/CIUohnzn6Fw/?igshid=2iohcm1x2pqv

Anyone else see this crazy build?