Valves misadjusted but still runs By mjcharger (Read 694 times)

[mjcharger]

I just adjusted the valves on my friends Fly Scooters Il Bello 150. I couldn't find any settings so I looked online. Eventually I came across something that said adjust to .004 (Didn't say inches or MM).

So, I dont know how or why, but I took that as .40MM (That converts to .016") and adjusted the valves to that. The bike started up great and ran just fine. I didn't hear any excessive tapping or else I would have been worried.

This morning though I was thinking about it and started looking into adjutsments. To my horror I see it should have been .004 INCHES.

So now, my question is should I go back and adjust them correct or will they tighten up? I've heard horror stories about tapping valves breaking, ruining engines etc. and I dont want that to happen to my friend. Those Il Bello style Chinese bikes are a pain to work on as the plastic body doesnt come off easily!

Please let me know what I should do ASAP as I'm leaving Monday for a work trip.

[beachbum]

You should be able to take the seat bucket out and get to the valves from the top and from the bottom. You shouldn't have to remove any plastic. The first time I set my exhaust valve at .005 and sucker tapped like crazy. I set mine at .0025" I would redo them. That's quite a bit out of the margin.

Most recommend .004" for the intake and .005" for exhaust. That's just to loud for my scooter.

[mjcharger]

Yea Im going to go back tonight and re-adjust them. I'll try .004" and .005".

On all the other bikes I've worked on getting the valve cover off was a piece of cake. The cover comes right off and away you go. I couldn't get the cover past the rocker arms or the gas tank so I had to loosen the plastic so I could bend it enough to slide the cover out.

I ended up taking the seat off, underside floor cover, and loosened up all the plastic near the engine. It took me about 2 hours to get everything off and about 10 minutes to adjust the valves. F#&K!

Anyone know how else to get the valve cover off easily? I'm not looking forward to it

[beachbum]

Mar 16, 2012 11:20:26 GMT -6 mjcharger said:

Yea Im going to go back tonight and re-adjust them. I'll try .004" and .005".

On all the other bikes I've worked on getting the valve cover off was a piece of cake. The cover comes right off and away you go. I couldn't get the cover past the rocker arms or the gas tank so I had to loosen the plastic so I could bend it enough to slide the cover out.

I ended up taking the seat off, underside floor cover, and loosened up all the plastic near the engine. It took me about 2 hours to get everything off and about 10 minutes to adjust the valves. F#&K!

Anyone know how else to get the valve cover off easily? I'm not looking forward to it

I have the Verona, which I believe is the same bike with a different name. I take the seat bucket out and then I can get the valve cover from the the top. Once loosened I pull off through the bottom. It's tight, but it slides out. Hopefully, that is the same for you.

[mjcharger]

Ok I adjusted the valves to .004" In and .005" Ex. Bike runs smoother. I had the owner ride it to make sure it felt the same. He's stoked and I'm glad everything worked out.

As far as pulling the valve cover out via the bottom of the scooter, the gas tank hung up things. What I did instead was pull all the vacuum hoses, ignition coil, and spark plug out of the way and eased the cover out the right side of the bike as best I could. I nicked the gasket on the underside of the valve cover a bit, but nothing too bad. Going in was a lot quicker and easier.

I still had to remove the plastic bottom skid plate/ floor cover so that I had room to work on the exhaust valves.

Thanks everyone for your help on this one.

[tvnacman]

While you were under there I would have snuged up on the exaust flang bolts . The have a habit of comming loose and falling off .
John