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Hi,

    I wanted to share some information with the site about Pirelli SL26 3.50-10 tires. There is tons of information about proper PSI on tires. Most people underinflate their tires and cause extra wear and tear. I have seen lots of posts about Pirelli tires wearing too fast. I recently had a pair installed on my 50cc scooter. I asked the Pirelli dealer what to run them at. He said 28 PSI for a soft ride and 35 PSI for best performance. I put them both at 34 PSI.

    I emailed Pirelli tech to inquire about proper PSI. I told them I weigh 185Lbs., the bike weights 200Lbs., and that I run WOT on hot Florida streets. This is their reply email. I hope this clears up some people's opinions on Pirelli wear and proper inflation.

**Notice the Min 42 PSI**

***They do say 47 PSI on the sidewall***

-Shane

Hi,

    Recently I opened up my valve cover to adjust my valves. They were set at .005" Inches, both -In and Out-. The scooter went very fast at this initial setting (45-48MPH+ flat road), for its first 1200 miles, but lacked acceleration .

    I tried to tighten them at .003" in and .003" out, but it ended up being .0035" and .0045"+... It had better acceleration and the speed was there, but the exhaust valve was tapping very loud and the exhaust pipe was not loose.

    So, today I went back in at about 9:30am and readjusted them to .003" In and .003" Out. The .003" feeler was tight and the 4 wouldn't fit either lash in its dreams. I let it warm up and took it for a ride switching in between racing hot and cruising.

    The acceleration feels exactly like it did before I touched the valves originally , but it only wants to go 37-40MPH unless I have a slight downhill grade in the road. I have since adjusted my carb mix screw and everything else is sound on the bike.

    I want to find a good spot of that acceleration from MY* first setting and retain some of the top end from the Initial* Setting...

    -Should I put the Exhaust Valve out to a Tight .004" setting..? And, leave the .003" Intake?

    -Should I make them both a tight .004"

    -Should I set both valves to .005" like they were SET when I bought the scooter new?

    *I think the exhaust valve tapping was louder on my initial setting, because the Intake was at a different pace and the two didn't drown themselves out as much...

    **Any input would be awesome from some people who change their valve lash adjustments a lot on 50-60cc engines. Mine happens to be a 60cc 2013 TaoTao.

I just did everything you did including a valve adjustment and it ended up being bad gas that I had just got from the station. Maybe the move put some condensation in the tank that didnt settle untill after you put fresh fuel in it and started it right away, then settled to the bottom over night. I have seen a lot of these posts lately. Maybe there is a poor fuel epidemic  The first time I had this problem on my scoot it was a vacuum line...

scooterdoc.proboards.com/thread/10414/50cc-idles-rev

-Shane

When coming down from wot, just as or before the clutch is disengaging, I hear a slight ticky ticky from the engine not the CVT. The engine in general sounds more fluid with the new valve adjustments. The torque curve has a smoother curve instead of the mid range power band blast it use to have, but I think it is more responsive this way, and probably less stressful on the engine

-Shane

Jul 8, 2014 12:03:43 GMT -6 Alleyoop said:

Adjust your valves both to .003 inchs
Alleyoop

This made a big difference on acceleration. The power curve is much smoother now. I just threw on a set of Pirelli's on top of it and this thing handles better than it ever did!

Thank You,

-Shane