tuning/starting grievances

viv v /

Jan 31, 2018 03:28PM

hello, so two issues with my bike, maybe related? i need y'alls help.

recently i updated my pipe from the proma circuit pipe, to what's listed on treats as the puch black pipe. it ran fine with my original jetting, until i got beyond halfway on the throttle, and it would bog down. so i figured this meant it was lean. i upjetted through the even range slowly, from an 82 (my starting size), and stopped at 94, where it started to feel like the bike was chugging, even on the low end. either way, throughout all these jets, i still had the same problem with my original jetting -

beyond halfway on the throttle, it bogs down. from the 94, i went down to a 92, and the low end is absolutely great, i just can't open up past half way, and i'm not sure where that puts me? a plug chop gave me a beautiful, golden brown, wet plug.

issue two, which maybe will have some leeway to an answer to issue one: my bike will not start if the engine is hot. i torqued everything, and recently had to install an external condenser. the only leak that will effect idling slightly is carb to intake, but i feel like every bike i've had leaks there. especially with bing's. the bike idles a little rough when i first start it, but once it warms up, it will idle beautifully. it's just that if i kill the bike to run into the store or something, i have to wait a good 5-10 minutes before i'm able to start it again. if the bike is cold, it starts instantly with no issue at all. however, when it's warm, when trying to start it, it almost seems like a fouled plug with the way it reacts.

sorry if this is dense; i just figured the more information the have, the more helpful it will be to reach a solution.

please help me, you lovely folks of the internet moped world. spring will be here soon and i wanna have fun in the sun.

Re: tuning/starting grievances

pat splat /

ggspeed

Jan 31, 2018 03:46PM

state carb, kit, n pipe, needle position, might help others to dials in yr bike

Re: tuning/starting grievances

DrGeorgeTompson (Alan) /

drgeorgetompson

Jan 31, 2018 03:57PM

Pretty sure 82 is way too big but as mentioned, we need more information.

Re: tuning/starting grievances

Probably Fred /

roffman

Jan 31, 2018 04:14PM

Miss matched set up/pipe

You went from a low end pipe to a hi rpm pipe, you need to tune clutch to get into the power band.

On a simple one speed engine with your set up (?) you should’ve stuck with the low-end pipe, maybe upgrade to a estoril or techo circuit for that treats pipe is best for big kit, big carb super tuned clutch etc.

Your jetting should be close to the same (82 seems too big to begin with) size, maybe a size or two bigger, you may have to mess with the needle and slide but without knowing what your set up is, what your clutch is, or what you’re timing is who knows

Re: tuning/starting grievances

viv v /

hellyeathatrules OP

Jan 31, 2018 04:42PM

sorry, should have mentioned the setup: treats 70cc kit, bing 15mm carb, currently running a 92 jet with the stated headaches.

Re: tuning/starting grievances

DrGeorgeTompson (Alan) /

drgeorgetompson

Jan 31, 2018 04:52PM

> vivek vasudeva Wrote:

> -------------------------------------------------------

> sorry, should have mentioned the setup: treats 70cc kit, bing 15mm carb,

> currently running a 92 jet with the stated headaches.

k so my friend had a case matched tccd and a 15mm bing and was running a 76 with no air filter and that was still a bit rich. The needle was in its leanest position.

when you start the bike cold, do you need the choke?

Re: tuning/starting grievances

viv v /

hellyeathatrules OP

Jan 31, 2018 07:56PM

nope, no choke.

Re: tuning/starting grievances

viv v /

hellyeathatrules OP

Feb 02, 2018 03:50AM

bump :<

Re: tuning/starting grievances

DrGeorgeTompson (Alan) /

drgeorgetompson

Feb 02, 2018 08:58AM

downjet dude.

It's not starting when it's hot because it is too rich.

Re: tuning/starting grievances

viv v /

hellyeathatrules OP

Feb 02, 2018 05:49PM

that’s what i would think, but the plug speaks differently, and plus, i needed to up jet for getting a larger pipe, but my series of rejetting culminated in no difference either way

Re: tuning/starting grievances

Chris Straub /

straubzilla

Feb 03, 2018 03:20AM

Nice Kromag/free spirit to magnum conversion, is that an mlm swingarm? If so how’s it feel/perform?

Maybe an inch or 2 off the bars? Also I think it would be slick to do up another front fender the same way you did on that one, and mount it to the swingarm facing backwards over the rear kinda like this for a low profile that moves with the wheel. Keep your jackets cleaner that way too.

And like others were saying, sounds rich so try 70’s range to compare. 2.17 atomizer?

Looks like the front brake cable is caught tight over the upper yoke too maybe?

All nitpicking and unsolicited advise aside, looks great!

Re: tuning/starting grievances

viv v /

hellyeathatrules OP

Feb 03, 2018 04:48PM

> Chris Straub Wrote:

> -------------------------------------------------------

> Nice Kromag/free spirit to magnum conversion, is that an mlm swingarm?

> If so how’s it feel/perform?

>

> Maybe an inch or 2 off the bars? Also I think it would be slick to do

> up another front fender the same way you did on that one, and mount it

> to the swingarm facing backwards over the rear kinda like this for a low

> profile that moves with the wheel. Keep your jackets cleaner that way

> too.

>

> And like others were saying, sounds rich so try 70’s range to compare.

> 2.17 atomizer?

>

> Looks like the front brake cable is caught tight over the upper yoke too

> maybe?

>

> All nitpicking and unsolicited advise aside, looks great!

much appreciated, this is my first build from a pile of parts, so i appreciate the kind words. been thinking about setting up a rear fender situation as well, especially living in rainy portland. it’s also funny you caught the brake cable thing, because i put these bars on right before this photo, and it definitely was catching. since then has been rectified.

thanks again!

Re: tuning/starting grievances

viv v /

hellyeathatrules OP

Feb 03, 2018 04:55PM

okay it always annoyed me trouble shooting my bike by studying these threads, and the solution is never posted. so i solves my problem and i’m just gonna post the solution in the case that anyone else has this problem.

fred’s guide of “gas, spark, compression” rolls through my head every time i work on my bike. being that the bike idled pretty soundly, i disregarded air leaks, as spraying the connective points didn’t change much. however, it seemed that it was just enough in the collective areas to effect the performance. i put new gaskets on everything, torqued everything down, started with the 92 plug chop, and as you would guess; crazy rich. dropped down to an 80, and the bike runs perfectly now. as for the no hot-starting, i think that may have been a result of being way too rich. if it still is acting up, i am going to replace the condenser. i’m not sure what makes these go bad, but i had this problem recently and changed it to solve it last time. thanks for your help dudes.

Re: tuning/starting grievances

Todd Rouleau /

t_rulo

Feb 04, 2018 08:09AM

I had something similar happen. I had to change to the leaner needle, and mess with the needle clip setting. Down size the jet and get the correct gas ratio from the needle and clip setting. That should do it for you. Try every setting to dial it in. Good luck and record your settings on paper so you don’t repeat settings you’ve already tried.

Re: tuning/starting grievances

Rebel Moby /

rebelmoby

Feb 04, 2018 09:36AM

Good you posted the solution that worked for your snags. That will be helpful for other folks with same troubles.

...by the way...

Next time you have trouble check the quality of spark before just changing the condenser - if the spark is not bright blue and snappy then it for sure is the condenser - otherwise it is other issues.

Spraying crap around the union of casings and fittings usually just wastes time and effort and rarely reveals leaks, and will never reveal a leak at a crank seal because it can not reach where the seal is, best to give a leak down test.

...just saying...

> viv v Wrote:

> -------------------------------------------------------

> okay it always annoyed me trouble shooting my bike by studying these

> threads, and the solution is never posted. so i solves my problem and

> i’m just gonna post the solution in the case that anyone else has this

> problem.

>

> fred’s guide of “gas, spark, compression” rolls through my head every

> time i work on my bike. being that the bike idled pretty soundly, i

> disregarded air leaks, as spraying the connective points didn’t change

> much. however, it seemed that it was just enough in the collective areas

> to effect the performance. i put new gaskets on everything, torqued

> everything down, started with the 92 plug chop, and as you would guess;

> crazy rich. dropped down to an 80, and the bike runs perfectly now. as

> for the no hot-starting, i think that may have been a result of being

> way too rich. if it still is acting up, i am going to replace the

> condenser. i’m not sure what makes these go bad, but i had this problem

> recently and changed it to solve it last time. thanks for your help

> dudes.

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