bogging down on hills

[rsnow22]

working on 2006 vino 50 4stroke. runs normal when cold. when warmed up & start up hill, it boggs down below the power range. could it be the roller weights or the tourque spring in the secondary or both? scooter has almost 10000 miles on it. roller weights are on backoeder from yamaha, so ordered 5.5 weights from this site, but they are 16 by 13mm. i may have ordered the wrong ones. the measurement in the service manual says 15 mm. any way to make the 16s work? thanks bob

[Carlson]

I will have to re-read the service manual. I thought it listed 16mm. What speed do you hold going up a hill? What size hill are you talking about? Keep me posted, as I stated, I am thinking of going with some different rollers or sliders for my Classic during the off season

[rsnow22]

the rollers may come tomorrow. i`ll tear her down &measure the old ones. wonder if i can get machine shop to turn them down to 15 by 12. there must be a run on them. having trouble finding them. bob

[Gabe502000]

If you'll install a set of Dr.Pulley 3.5 or 4gr sliders in your stock variator you'll be really pleased. If, while you've got your variator apart, you'll polish the wear marks left by your rollers out, as much as you can, with some Crocus cloth. Your new sliders will break in a lot quicker. Gabe

[rsnow22]

i installed 5.5 gram polini rollers in the stock variator. that helped somewhat, but there`s still a shortage of power. it starts and runs fine, but has lost power. doesn`t miss. won`t keep up with other 50cc`s. could it be clogged exhaust? cdi that won`t advance? carbon build up? seemed to have happened all at once. 2006 vino 4stroke with 10000 miles. thanks bob

[Gabe502000]

On my C3, (which has the same variator as your Vino 4T.) the stock weights (6.5 gr rollers) gave really good start up. But, it would only run out to about 38 mph. A set of Dr.Pulley 4gr sliders once broken in, makes 43-45 mph....on a C3 . Should do about the same on your Vino Classic. Gabe

[harry]

you might try a new belt. at 10k the chances are its worn past
the wear limit which results in poor performance and lower top end
speed.

oilyhans

[Gabe502000]

you might try a new belt. at 10k the chances are its worn past
the wear limit which results in poor performance and lower top end
speed.

oilyhans

That's a good idea. The belt on my C3's width limit is 16.1 mm and it's changed every 6,250 miles. He's probably running the OEM belt. A new one will help considerably!

[Carlson]

A new belt might be a good place to start. When you went from 6.5 gr rollers to 5.5 gr, it should have improved your uphill, but probably reduced your top speed some. You say it bogs down, what kind of up hill speed are your doing and what kind of hills are you climbing? When my 07 was new it would drop down to about 20-25 mph going up a fairly steep moderate height hill. But at around 800-1000 miles it improved and I can take the same hill at 25-30 mph. Also cleaning out the muffler would be a good idea. Check your muffler, there may be a bolt to remove to clean it out? Did the 16mm rollers work OK. I rechecked the Service manual and it does state 15mm. Also might go with Gabes suggestion and go with Dr. Pully sliders. I am thinking about doing it this Winter when I can't ride, also I am going to check into a better belt.

[Gabe502000]

Awhile back I was talking to KS Power about my scooter and the subject of the Dr.Pulley variator being used on a Vino Classic came up. Nick told me that the D/P unit can be modified to work on a Classic, since it uses the same variator as a C3. (Just has a different clutch.) With a D/P variator, 4gr sliders, an exhaust system, and the next tallest rear tire, I'm able to keep up with traffic in a 45 mph speed zone on a straight and level road. Gabe

[rsnow22]

thanks for the help fellows,
already have new belt. the exhaust has a small screw in the pipe next to the head. how do i clean the muffler? the bike used to out run most 50`s, but just lost power. seems to do ok when cold, but gets lazy when it gets hot. not concerned abt top speed; just need to pull hills better. thanks bob
ps the 16`s didn`t work; had to order 15`s. they work fine.

[Carlson]

What size and incline hills are you riding? What kind of speed are you holding go up these hills?

[rsnow22]

carlson,
i don`t know what the % grade it is, but it is a long grade and it used to top it at 20 mph. after it lost power it would only do 13 mph. however i have fixed it, but i did 2 things at once and not sure which fixed it. found that it was 2 inches over full with oil, so changed oil. also took muffler off and ran cleaning fluid thru it in both directions & blew it out with compressed air & PUT IT ALL BACK. she is back to normal now. bob

[Carlson]

Either will affect the performance, no question. I can take a prettery steep long hill at 25-27 mph if I am going top end when I start up the hill. Torque has never been a problem on my Classic, I would just like to get a good honest 40 mph out of it. I would think going from 6.5 gr to 5.5 gr rollers would have increase your uphill speed.
On your other post you stated Kspower said With a D/P variator, 4gr sliders, an exhaust system, and the next tallest rear tire, I could do 45 mph. Do you want to invest approx $400-$500 to go 45 mph.? I don't. I am thinking of going to some Dr pully sliders and maybe a better belt this winter, and hopefull get 40 mph but that's it. With what it would cost you to modify your scooter to go 45 mph, you sell sell your Classic and buy a 125 cc and go 50 mph. Modding a 50cc scooter to go 45+ mph rather than just buying a bigger scooter in the first place has just never made any sense to me. You invest $400-$500 and you still have a small frame scooter that was never designed to go that fast. A lot of parts are going to wear out or break before their time.

[j~scoot]

Modding a 50cc scooter to go 45+ mph rather than just buying a bigger scooter in the first place has just never made any sense to me.

I think it just comes down to the fact that small fast scooters are bigger than big fast scooters. Its sort of like choosing a scooter over a motorcycle. But you are right that if you need to hit a certain speed in order to get out of your scooter what you need, then it is a good idea to just start with a scooter big enough to get you there.