Checkin in, first post... here at least

[Trafficjamz]

wheelman- your original recommendation to me, along the lines of 'start no lower than 150-155 main' , for a starting point one would just go down from there correct?

No one like to recommend too small of a main jet.

Wheelman always suggests rich jetting and leaves it up to the owner to down jet from there.

[Wheelman-111]

Greetings:

TrafficJamz is onto me!
Yes, I probably did recommend stupid-big, perhaps misapprehending that you were running a 28, or maybe chickening out because of the 86cc sucking through a 26. Furthermore, I have low confidence in any of the Tai bores tolerating lean jetting due to bitter personal experience.

My Corsa's running a 125 now, but with only 72cc, even wailing at 10.5K RPM, I can probably get away with a smaller jet than you can. Proceed with caution as you get down to 135, and of course, a vacuum leak ANYwhere will increase the risk of Doom. Make sure that pipe seals properly and check often for telltale oil seepage.

[Chicago Ben]

oh you guys are just so smart

Today I got home from work, watched 2 episodes of pawn stars on the history channel, got off my * and threw that 140 main jet in there.

WORLD OF A DIFFERENCE

I can go over half throttle now to maybe 3/4!

No clue how fast I'm going, probably did about 45 today. I spiked to 358 degrees F today but I'm pretty sure I floated right around 330 F most of the time after I was riding for a bit

I went over 3/4 to near WOT one time and it died. Kick started right back up.... (I know I know, not WOT until fully broken in)

Not sure where to go from here because I know I'm so close to being perfect. Do I screw with my needle clip position or play with fire and jet down to 135....

I appreciate your guys input thus far!

[KingJeff801]

Dude....you need to post some pics of that bad itch complete!

Good luck with your tuning

[Trafficjamz]

When does it hit the higher temps?

Does it spike when you let off the throttle?

If so maybe up the pilot a bit.

Don't jump five sizes on the jet when you are tuning unless it is WAY off.

Small changes now

maybe try a 138 next, but keep a close eye on the temps.

400 degrees is the danger zone for a new bore

If you have a compression gauge you should recheck it now that the base gaskets may have squished a bit.

[Chicago Ben]

I have a compression gauge ill get a reading tonight after work
You need any large jets?
My current needs are new plug cap and small jets range

The bike has a slightly hard time coming off throttle to a full stop, sounds like its about to die but then doesn't...

[Trafficjamz]

I have a compression gauge ill get a reading tonight after work
You need any large jets?
My current needs are new plug cap and small jets range

The bike has a slightly hard time coming off throttle to a full stop, sounds like its about to die but then doesn't...

What size is the pilot jet now?

[Wheelman-111]

Greetings:

I scrolled up. In our Last Episode, Ben had a 50 Pilot. That should be enough for a 26, but Jamz is right about watching the gauge when you chop throttle. It should stay the same or go down. If it goes up, even a little, you should seriously consider a 52-55 Pilot. That increased flow from the Pilot circuit in turn allows you to run a smaller Main. Despite what you've heard, the Pilot continues to contribute its share even to WOT.

I'm still concerned about any temps over 350 on a Ruima bore. I wouldn't assemble one to run on the street with compression higher than 125. Experience...

F4PM7Piston.jpg (262.72 KiB) Viewed 3857 times

...is the best teacher. Learn from others' experience. It's cheaper.

[Chicago Ben]

alrighty guys checking back in for anyone who is curious to know where I am at

Jets from autotech on ebay came in today, just got back from my last run of the night with a 128 main jet

Runs great. Spiked at 335 F.

I think I'm going to go down to 125 or 120 though.

I do have an issue right now however. It is like whenever I go over a speedbump or any kind of road pitch change the bike almost dies out. I feel like I need to up my pilot to a 55 (I'm at a 50 pilot now)

Not real sure.

In other news, procured a used met wheel from our friends over at totalruckus.com , so I will be getting that powder coated as soon as it comes in and slap the pirelli meat on shortly after that.

[Wheelman-111]

Greetings:

Benny got his Jets. Quoth he:

It is like whenever I go over a speedbump or any kind of road pitch change the bike almost dies out.

That sounds almost exactly like a loose carb. Read it again and think.

[Mystic]

my spree is doing the same thing, i thought it was the float and float valve but i was thinking last night that it could be the coil plus you said something about a new spark cap, double check that part too. I am going to swap coils out today with another one and see where that leaves me.

[Chicago Ben]

Greetings:

Benny got his Jets. Quoth he:

It is like whenever I go over a speedbump or any kind of road pitch change the bike almost dies out.

That sounds almost exactly like a loose carb. Read it again and think.

I honestly highly highly doubt that only because I have these hose clamps tightened to the moon in fear of that carb ever falling off. I use a 5/16 socket to tighten those even...

I feel like my idle mix is off maybe

[Chicago Ben]

my spree is doing the same thing, i thought it was the float and float valve but i was thinking last night that it could be the coil plus you said something about a new spark cap, double check that part too. I am going to swap coils out today with another one and see where that leaves me.

I was thinking that could be it... because I do experience this when I hit bumpy areas as well...

[Mystic]

dont know for sure about your problem but i changed out coil cdi and bystarter and muffler still the same thing when i hit bumps. if you figure it out let me know so I can try what you did, I dont have an exhaust gasket so i cut one for the elite to fit and it did seem to work better except really hard bumps so maybe an exhaust leak??

[Chicago Ben]

Adjusted my idle mix + installed a generic NGK 90 degree spark cap seems to be good now

Still need to jet down from 128, I think 125 or... 120 even might do it


other news: installed a new battery. electric start works great. boom!