Polini garelli tuning

Ok so I got my new polini kit installed on my garelli. I'm running the stock 14.12 with the plugs in the filter pulled out and runnning a 68 jet right now. I am also just running an open header because my stock muffler is too clogged.

1st problem - The compression is so high I can hardly get the clutch to engage enough to start it. I'm guessing this is because someone shaved the head way down. I am running a head gasket though so I thought that would take care of it but I guess not. Could the fluid in the tranny just be low and that causing problems with the clutch?

2nd problem - This is the biggest ordeal. Air/Fuel tuning. Am I at a good starting point? (refer to above setup) Is there a book somewhere on tuning these carbs that has thing to look for in how its running in correspondance to what to change? Or do I have to just keep buying new plugs and doing chops till I get it right? Also how does exhaust change the mix? I have an open header right now.

Besides that though I had it running on the stand just to make sure it fired and ran good. It sounds fuckin pissed !!!!! It was like it wanted to just take off and drive right through my house!!! It's loud as fuck with open exhaust!! Please help me so I don't blow this thing up. Thanks

- Chad

Re: Polini garelli tuning

put a pipe on it.

Re: Polini garelli tuning

Chad Carlin /

all i have uis the factory one and its too plugged to even run really if i drill it out is that better? and what difference is this gonna make?

Re: Polini garelli tuning

Brake cleaner

Carb Cleaner

Engine Degreaser

Gasoline

Windex

409

Elbow grease

Whatever it takes!

Get your exhaust pipe cleaned out and mount that up before you seize your ped!

Good luck with your Garelli - my friend is getting one this weekend.

Can't wait to see one in person...

Justin

Re: Polini garelli tuning

Chad Carlin /

ok I'll make sure i get it on there I've already tried everything there is to clean it out. It'll run now with it on but performance is seriously hampered and it takes forever to start. When its off it always fires on the first kick. I guess I'll just drill out what I can of it.

Re: Polini garelli tuning

yeah go nuts on that stock pipe so you have something to use. maybe try burning it out (search function). it always seemed like a bad plan to me but if nothing else works...

Re: Polini garelli tuning

Chad Carlin /

yeah I already tried burning it out that's actually what made it so it would actually run with it. I saved it as a last resort and it was the one that actually did really good. Chrome will need some hard cleansing now but it will work atleast. I guess I'm just gonna drill it out more untill I can get a good pipe for it. What about the other questions any help with those? I think I figured out the clutch slipping, the repair manual says low oil and what do ya know the fill plugs fucked up and leaked all the oil out.

Re: Polini garelli tuning

I would read about 2 strokes. So you know the what to do and not what to do.

Re: Polini garelli tuning

You learn more about stuff when you tune a motor/carb first hand not from a book, just my cents. You look up garellis clutches there alot of problems with them. I wish you luck. Theres a manual the riders site. I think.

Re: Polini garelli tuning

Oops, Dollar store oven cleaner. Its works great if you can get a oven and bake the pipe it works well if you have a stove outside... Just warm Not on fire makes the over cleaner work better. I flush the oven cleaner out with brake cleaner thats a salty way but it work drys everything up in there. Coathanger works well them, bent into shape... with a small hook on the end.

Re: Polini garelli tuning

yea I need to proof read. damit. I know I saw something about mineral sprints soaking or something with garellis.

Re: Polini garelli tuning

Chad, before you want to spend another $180 or so on another kit, try to...

a) find a new head (the stock heads are not meant to be shaved as so the head gasket which came with the cylinder could be set in the groves of the head and thus creating a seal,

b) fix your pipe or preferably buy a performance pipe (no exhaust= to much air sucking up into the cylinder= too lean of a fuel mixture= seizure, and

c) get a bigger carb for the cylinder and a bunch of jets. Dellorto makes a 15mm SHA which would work pretty good.

Right now you have a 12mm carb with no air filter or exhaust pipe which means you are getting a whole bunch of air going into your cylinder, not enough gas, and are most likely running way too lean. That's the quickest way to seize your brand new cylinder and that would be a crying shame. If anything, you need to run your bike rich to make sure your rings will set so they won't get too hot and seize. You will want to run a mixture of 32:1 during the break-in process.

Before you run your bike anymore, I would definitely do some of these things. I know you must want to ride it right now but believe me, it will be well worth it and save you a bunch of money you spent on that new cylinder.

Good luck,

Steve

Re: Polini garelli tuning

Chad Carlin /

thank you for the advice steve I just ordered a 16mm sha from 1977. I am running an airfilter I have the stock unit I just removed the plugs in it to allow more air which i figured 64cc would need. I also just drilled out my pipe pretty good to allow atleast a little more than stock flow and put it back on. I figured out the deal with the head gasket when i was puting it on i had a little trouble centering it when installing it. I had to use a small screwdriver and hold it in place I'll pick up a new one from the junkyard asap. Thanks for the advice.

Re: Polini garelli tuning

Jets should be in the high 70's, low 80's with 16mm. Get a range. As for that pipe, put one on there. A shaved head on Garelli doesn't do anything until you hit about 2mm, the depth of that groove the head gasket sits in, and even then you have to run with no gasket. DO NOT run a stock Garelli head gasket with the Polini kit. It's not wide enough to accommodate the dome of the piston and will mar the edges of the crown.

Really though, it's a sturdy kit, hard to bust. Believe me, I've tried. If done right, they can be fairly quick too.

Re: Polini garelli tuning

Chad Carlin /

Well I put my stock pipe on and even with drilling I couldn't get it to start. So I guess I'll be getting a new one someone just emailed me with a possible pipe for it. As for the head gasket I'm running the one that comes with the polini kit should I take it out? The lip on the head is totally gone that the gasket sits on I just centered it the best I could and tightened it down looks pretty even to me.

Re: Polini garelli tuning

The one that comes with the polini kit works fine, you can ditch it if you want, but you'll get a leak. It's a small one with a stock head, no telling what yours will do though. Use a little oil to stick the gasket to the jug then carefully install the head on top. easiest way is to drop the engine and stand it up on it's end so the bore is pointed straight up.

Re: Polini garelli tuning

Chad Carlin /

Anybody wanna buy a garelli? lmao this fuckin thing is pissin me off I guess I should have just left it alone. First I fired it and when I'd give it gas it would bog out and die. So I reinstalled the tubes in the intake thinking it was too lean. Fired right up and ran pretty good nice crisp throttle response. So I take it out for a ride, first of all the clutch slips if I don't really ease into the throttle slowly. Second when I get up to about half throttle and then just give it a little more it dies and wont start for a few minutes. Now it did this three times and then finally it wouldn't start again. Wait a few minutes then it will barely start but not keep running. I really want to get it atleast running good enough that I can do a chop and start tuning this thing but its pissin me off!!!

Re: Polini garelli tuning

you should be able to use about any kind of exhaust ..mine has a clamp and rubber bridge type thingy.......im sure u could rig almost anything to it......

Re: Polini garelli tuning

Chad Carlin /

Well I got it running again today turns out I got some shit in the gas and it clogged the filter and the jet. Cleaned everything out, replaced the carb fuel filter and the in-line filter. Fired right up!! Now I just took it on about a 30 mile ride and everything seemed to run really well. Unless I was taking off up a hill I didnt even pedal it to take off and it works flawlessely.

At higher speeds it seemed to 4 stroke alot but i'm guessing that's just because I'm running it so rich to break the kit in. I can't wait to get it broke in and lean it out a bit and get some good speed. I'd say it was doing about 35-40 at half throttle so once i can get full throttle and tuned it should be pretty good.

It also powers right up hills that i was bog down to about 2mph on before the kit. Even accelerates up most of them!!!

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account