Need some help guys. Can't get a fresh rebuilt motor started

[sheerider11]

Your jetting seems about right.

Maybe 30 because they say vf4 like more jetting in the pilot

How about your crank tho?? Did you do anything/ replace it? Or is it an old one?

[Free yellow banshee]

I didn't do anything with the crank. I pulled on the rods and they had no play in them. I probably should have ad it tried and welded. If it goes I'll build a 4mm

[Free yellow banshee]

The wired thing i think the 27.5 pilots might be a little much. I had the air screw out 3 turns and it sounded pretty good. I just did the 3rd heat cycle so now i'll sync the carbs (with sync tool) and start the jetting process.

[Free yellow banshee]

So I just went out and messed with it some. Let me start by saying I do know how to jet a two stroke carb. I have jetted a couple bikes and got them really close if not perfect. I own a sonic cleaner and the carbs on the shee are absolutely spotless. I went out and fired it up in one kick with full choke. I attempted to adjust the air screw to determine what size pilot I need. For some reason I am able to seat the mixture screws with no change in idle. I can also take them 4 turns out with no noticeable change in idle. I know you have to give it some time for the engine to catch up to the mixture change. I have never seen this before. Usually if it mixture needs to be more than 2 turns out to achieve highest idle then it needs a smaller pilot and vice versa. The bike seems to rev clean with no flat spots. Any advice?

[Free yellow banshee]

Anybody?????

[Larry's Shee]

Got the carbs syncd yet? Free reving with no flat spots isn't the same as driveability. Presume you haven't test rode it yet? Don't think I've seen anyone with smaller than 27.5p on any modded motor. As mentioned the V4s seem to prefer a bigger pilot jet. Might do a search on that, at least check the V3 vs V4 thread at least.  Worst/hardest thing is trying to do a plug chop/read for the pilot circut.

 

Maybe check with your builder see what he says.

[Free yellow banshee]

Thanks for the input Larry. I think I will order some 25 and 30 pilots. I synced the carbs yesterday. It starts first kick when cold and idles perfect. The only thing that concerns me is the air screws not having an effect on the idle. I can close them all the way and the idle doesn't change.