Super Yager?

[MotoRandy123]

In looking around I found the Sym RV200 listed. From the specs it looks like exactly the Yager,
though the weight is shown as 345 lbs! Then it might not have ever been sold instead I find the
RV 250. It was spec'd as a higher top speed. The Yager might be the RV200, it was just never
sold by Sym? (I wonder why we get carb and the UK gets FI?) http://www.symuk.co.uk/hd2_200cc.html

The Sym HD200 is similar to the Yager too but it has a carburetor. From the service manual it
has a 4 valve head. The new Movie 150 has 4 valves and makes 1 - 2 HP more than the older 2
 valve ones.

 Maybe we could buy a 4 valve head and pop it on the Yager? It might give you a couple of HP and
give you a higher top speed?

 Along the same line, I was riding my Yager the other day and had to jump on the highway. It held
65 at redline and I could go 800 RPM's above redline to acheive 70 MPH (on a slight incline). I didn't
feel any rev limiter. Does it have one? Will I kill the engine over reving it?

 These engines are based on an older smaller design, I'm not sure any engineering has gone on to
push the envelope on the bigger ones. They seem to spec them all at the same torque and HP rev's.
It's nice to be able to compare but doesn't tell you what the real numbers are.

  If redline was really 8800 instead of the 125's 8000 we might be safe to run it there. I read
somewhere that scooters are rev limited through the variator. So if you play with things you
might be able to overrev...

[MotoRandy123]

  The SYM Hd 200 evo has the 4 valve head but is spec'ed as the same
torque and HP. It also weights 11 pounds less even with bigger wheels
(and carb instead of FI). The top speed is listed as 72 where the Yager
is 67. The big wheels might allow that.

  But the big question is why does it make the same power? My thought
is these 175cc motor peak at a different RPM and the variator creates
and artificial rev limiter.

[fshfindr]

  The SYM Hd 200 evo has the 4 valve head but is spec'ed as the same
torque and HP. It also weights 11 pounds less even with bigger wheels
(and carb instead of FI). The top speed is listed as 72 where the Yager
is 67. The big wheels might allow that.

  But the big question is why does it make the same power? My thought
is these 175cc motor peak at a different RPM and the variator creates
and artificial rev limiter.

No carb in the Yager, it is FI.

[MotoRandy123]

Found out today the Aprilia Scarabeo 200 i (which is 171 cc and 4 valves) puts out
14 Kilowatt (18.7 HP). The Yager is 15 HP so a big boost could be had if you can
get the FI to cooperate...