I've got a Magnum MK11 that did 40 m.p.h. stock with factory 16/40 sprockets.
These peds have 2-speed automatic transmissions and have great acceleration off
the line, in my opinion one of the best motors ever made for a ped. Your problem
might be that you've got so many miles on it that the cylinder/piston might be
> > I recently purchased a '90 Yamaha Riva Jog for my wife to ride. It's got a
> > little over 1000 miles. I also have '79 Puch Magnum MK II with 9500 miles.
> > > > The Jog has buckets more power than the Puch, even though they're both 50
> > cc. Any ideas on why this is? I've been thinking of selling the Puch
> > 'cause it won't quite make it up the hill to the house. The Jog hauls at
> > 20+ with no problem.
> > > > The Puch seems to run will enough, just not enough grunt to make it up the
> > hill. The plug is new and I had it serviced recently by a knowledgeable
> > moped mechanic. Any thoughts?
> > The Magnum MKII has a puch Maxi engine I believe. Those engines just
> aren't that good. They don't have a lot of power at low rpms.
> What you can do is get a bigger sprocket on the rearwheel, but that will
> also result in lower top speed.
> > Robbert
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