KymcoForum.com

.05mm/.002" for the valve clearance.

The oil screen is in the crankcase. You have to remove the right side cover (where the brake pedal and kickstand are) to get to it. I haven't cracked it open myself; I know there's at least one person here who has, so maybe he'll chime in. Maybe it's easy, but I decided so far that it's not worth the effort and risk of losing something tiny that might be difficult to replace.

The kickstand is on the left side.  Is it different in other countries? 

So the entire transmission case has to be taken apart to reach the screen?  That's a bad design.

Hello all.  I was wondering if anyone had messed around with k-pipe jetting and/or using a high flow air intake?

I was messing around with my 49cc Tomos moped recently and I was surprised at what a huge different a new air intake, exhaust, and jetting made on the system.  It's such a small engine that I didn't think it would need much in the way of air flow and exhaust flow.  It has a stock #55 main jet but with the new air intake and exhaust, I couldn't even get it past 15mph with a #58 jet because the mixture was too lean!  I had to jump to a #62 jet to even get it to go to second gear.  From reading some forums, I think it will need a 64 or higher jet which I unfortunately do not have yet.  I have read that the Tomos can increase in speed and power by going to a #58 get even with the stock equipment.

I was thinking that the K-Pipe may be under jetted as well in order to limit its speed and increase its fuel economy.  It's odd that the k-pipe engine is so low revving and low power despite being a small displacement engine.  Other similar 2 valve engines like the Honda CB125r get 14hp at 10000rpm while the k-pipe only gets 8 at 7000rpm.  I think this low level of performance is an indicator that something is restricted on these bikes and I would like to remove those limitations.

I was wondering if any of you had messed around to jetting and/or air intake changes?  What are your opinions on the stock air intake?