On Sat, 13 Apr 2019 16:32:20 -0400, Dennis Lee Bieber
Post by Dennis Lee BieberFairly certain it was carburetor -- but it's been over 13 years, and
the only thing I ever had to do to it was tweak the idle-speed screw -- it
tended to work out resulting in stalling when the choke went off but the
engine wasn't fully warm.
Post by C***@deathtochristianity.plAlso do you know if CVT gets better mpg or a manual clutch
transmission?
I think that's part of why some autos tried them (and in an auto, they
could add computer control systems to optimize the CVT even more). The idea
being that, based on the load at any given road speed, the pulleys will
adjust the ratio. You won't be spinning any tires or doing "wheelies" with
one though, as you can't gun the engine and then drop a clutch. The CVT
uses weight rollers on the engine pulley -- the faster the engine runs, the
more the weight move out, pressing on a slanted surface to squeeze the
front pulley narrower -- forcing the belt to the outermost diameter. The
rear pulley has springs with try to force it to narrower, along with a
diagonal slot and pin. When you come to a stop, the front pulley isn't
forced narrow, and the springs squeeze the rear pulley -- "low gear"
configuration. The diagonal slot and pin handles change in load (going up
hill, say) as the load increase makes the pin move sideways in the slot
(helping the springs move the pulley) reducing "gear".
There is also a centrifugal clutch in the rear hub, between the pulley
and the wheel -- needed to allow the pulleys to rotate at all times.
Automotive CVTs didn't really have the torque handling ability for
heavy duty. Instead we now find things like 9-speed automatic transmissions
(in the Jeep Cherokee). Again, the design intent is to keep the engine in a
narrower performance band, instead of having to swing to high RPM, then
drop to somewhere above idle and work back up...
Well the reason that I am asking is because I was looking at a 250 CC
bike with a 5 speed shift. But it is the same brand of Chinese that I
have now, and I was a bit weary because it keeps stalling. But from
what you told me that could be normal for a small 1 cylinder engine. I
was also worried that a 250 cc bike may not get that good of gas
mileage which is the entire reason I bought one in the first place.
I bought mine in November and have over 3000 miles on it not adjusted
for error. but divide that by lets say 60 mpg and that is about 50
gallons of gas.... multiply that by 2.50 <avg price of gas during that
time> you get 125 dollars
now do that again for my truck 3000/10 = 300 x2.50 = 750
125$ vs 750$
that is a lot of money saved. The cheap Chinese scooter that I bought
for about 750$ (550 + shipping) has almost paid for itself
That other 250 cc bike that I am looking at costs about 1000 dollars
plus almost 300 for shipping and I was concerned that if it did not at
least get 50 MPG it would not be worth it
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____/~~~sine qua non~~~\____