Garelli crazy high idle on stand. On the ground idles great

Luke W /

Feb 11, 2019 02:00PM

Good Day everyone, could someone shed some light on this issue. My moped rides fantastic it pulls off with torque and I’m happy with the idle speed. Problem is as soon as she’s on the stand she’s revving too high. It sounds like the whole thing will blow up if I don’t hit the kill switch. I’ve sprayed carb cleaner around the intakes to check for air leaks with no avail. Does it matter she revs so much on the stand? It’s literally only on there to start it, or will this In turn cause a strain on the engine when it’s on it’s wheels but stationary?

Cheers guys, Luke (edited)

Re: Garelli crazy high idle on stand. On the ground idles great

Totally normal JBOT /

capturedbyrobots

Feb 11, 2019 02:49PM

That's a lean condition or your throttle cable is being pulled.

What carb?

Re: Garelli crazy high idle on stand. On the ground idles great

Luke W /

garellikartia OP

Feb 11, 2019 03:06PM

It’s a Dellorto sha 14:12, cheers

Re: Garelli crazy high idle on stand. On the ground idles great

alex . /

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alextetreault

Feb 11, 2019 03:18PM

Have you adjusted your idle screw?

Re: Garelli crazy high idle on stand. On the ground idles great

Luke W /

garellikartia OP

Feb 11, 2019 03:24PM

Yea it’s adjusted all the way to lower the rpm, checked my exhaust and intake for leaks.I have also dismantled the carb and it was thouroghly cleaned. I mean it doesn’t bother me it idles so fast it’s just I don’t want that to mean it’s putting extra strain on the engine, when it’s off the stand it runs like a dream.

Re: Garelli crazy high idle on stand. On the ground idles great

alex . /

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alextetreault

Feb 11, 2019 04:29PM

You probably have a base gasket, head gasket, or seal leak then

Re: Garelli crazy high idle on stand. On the ground idles great

pat splat /

ggspeed

Feb 11, 2019 05:07PM

look to see that your throttle slide closes all the way, should be closed all the way and not hung up. if its closed and still idling high then u got an air leak, youll seize when its running and too lean on top.

Re: Garelli crazy high idle on stand. On the ground idles great

todd amundson /

nudebowl

Feb 11, 2019 09:03PM

Dude this is a Garelli NOI. As soon as you bring its ass end up the rubber clutch takes the rear wheel for a ride. The faster the wheel spins the higher engine rpm goes. And in no way can you bring down idle speed via the screw to control this problem/ because then you let the wheel down and the engine dies because you can't get the stupid rubber clutch to disengage. In L.A. we now run urethane.

Re: Garelli crazy high idle on stand. On the ground idles great

Totally normal JBOT /

capturedbyrobots

Feb 11, 2019 10:21PM

Interesting!

Re: Garelli crazy high idle on stand. On the ground idles great

Luke W /

garellikartia OP

Feb 12, 2019 07:48AM

They look miles better! Tbh I did toy with the idea of making my own by using the polyeurathane casts. My clutch is the single speed kick start, so only has three “traingle” grooves or so to speak.

Re: Garelli crazy high idle on stand. On the ground idles great

Luke W /

garellikartia OP

Feb 12, 2019 07:49AM

> pat splat Wrote:

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

> look to see that your throttle slide closes all the way, should be

> closed all the way and not hung up. if its closed and still idling high

> then u got an air leak, youll seize when its running and too lean on

> top.

Cool I will check this afternoon and again for air leaks. Thanks

Re: Garelli crazy high idle on stand. On the ground idles great

The Real Mike D /

therealmiked

Feb 12, 2019 08:34AM

@todd

Where did you get that urethane clutch? Homemade?

Re: Garelli crazy high idle on stand. On the ground idles great

Luke W /

garellikartia OP

Feb 12, 2019 12:11PM

Hi guys I managed to sort it using the following; checked slide was moving properly and closing fully.

Poked hole in needle with a small piece of wire

Sealed all around the inlet manifold with gasket sealer

Put a new jubilee clip around the air filter and voila!!! She purrs like a kitten now!!!

Thanks for all the advice and recommendations, much appreciated x

Re: Garelli crazy high idle on stand. On the ground idles great

Garelli Master✨ /

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stephens

Feb 12, 2019 12:22PM

> Dirty Mike Wrote:

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

> @todd

>

> Where did you get that urethane clutch? Homemade?

Re: Garelli crazy high idle on stand. On the ground idles great

Born to be WillD /

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willd

Feb 12, 2019 02:27PM

More deets on urethane clutch pls. My friend sarah recently started doing silicone and urethane for some toys and we were talking about casting clutch for my NOI but I don't even know where to start for durometer/hardness/elasticity blends. You just wing it or is that a calculated composition?

Re: Garelli crazy high idle on stand. On the ground idles great

todd amundson /

nudebowl

Feb 13, 2019 10:38AM

Global cast:

Colored units are 75 A

White is 85 duro.

I machined the samples prior to handing them over. Softer colored units are 4 percent smaller on the OD. I’m still playing around a bit but they’re in engines now and seem way better. In a stock set up these take a while to warm up. Slip a lot. Obviously I don’t talk much so sorry.