8 weight 12g Dr.Pulley variator sliders comments

hello tplasek: In general with lighter weights you gain in the take off but loose on the top end. Since you will need more torque than speed to go up hill you may want to go a little heavier. The fact that the air intake hose was off would effect the engine performance, but the air fuel mixture is also part of the equation.
In my Linhai 300 I put 8 11 gram sliders and was pleased with the performance.
Make sure that the belt is not worn and the air filter is clean.

I may have the wrong interpretation of how the variator works. My interpretation is the weights sit in the retracted position at idle and the variator pulley is fully opened. As you increase the rpms, the centripetal force pushes the weights outwards, closing the pulley and making the belt ride higher in the variator pulley. Now since my factory weights were 14 gram (I haven't mesured them yet) and I stuck in 12 gram weights, the engine would have to be at a slightly higher rpm to achieve the exact same variatior slider movement as before with the 14gram weights. I think I have this part figured out. Here is I may be a little fuzzy. I would think at some said rpm, the weights should either roll or "slide" all the way to the outside of the variator and fully close the pulley. One would think if you had 14gram, 12gram, 11gram, or 10gram weights, ALL at some said rpm would fully slide to the outside of the variator and fully close the pulley. This is where I don’t understand how you can loose top speed unless you are bumping the rev limiter. Others input on this would be greatly appreciated.

Now for the important question. Allworld, how can you tell if the belt is worn or not? The belt was the very first thing I looked at after I took the cover off, but I did not know how to tell if it was worn or not. How do measure or look for stretched or worn belts? The scooter has 1800 miles on it.

Found the weight specs for the VOG 260 and the net weight is 374 lbs and gross is 462 lbs.

Weight for my 250B is 319 lbs. net and 340 lbs gross!

Deffinitely a heavier scooter! JRR

I never thought about the weights just not being heavy enough to push all the way to the outside. I can see how wind resistance and lack of horsepower limits the rpms from getting high enough for the light weights to push all the way out. I guess my theory only works on the service stand with no wind.

Thanks for the input guys. I need to do the following: 1: get the size of the belt (It is stamped on it) and measure its width and 2: weigh my factory rollers to see if they are indeed 14grams.

tplasek, I don't know what my weights are, they are stock, I never changed them and never weighed them. I Know Garner Park very well and the route to it, Are you talking about riding all the way there, or trailer it and ride around the area. I think which ever weights you use within reason you should have no problem, Oh be sure to take the ride to CAMP WOOD out of Leaky Tx, that is noted as the best ride in Texas. Oh be careful, I met my first wife camping at Garner, and I met my second wife camping at Garner, I'm not going back.

jrryan, sorry but true, but they were 17 yrs apart, what happens at Garner does not stay at Garner, just took a sweet 50 mile cruise, great weather Adios

I really don't think they will be worn that much as if you've never opened the variator on the scooter. Generally from the factory it has way too much grease in it to have too much wear! I removed mine with 2500 miles and they weighed right at 14 grams! Like always one needs to weigh them but at least I can say that everyone that I've seen list the weight for the 250B has said 14 grams! JRR

I weighed the roller weights which were in my wife's 2008 Linhai 300. They weigh in at 11 grams each. I am not the original owner of the scooter, but I kinda doubt the 40 year old lady that owned it before us changed the rollers to from 14 grams to 11.

So now I have gone from 11 gram rollers to 12 gram sliders. I think I may have gone the wrong way for riding in hilly areas. Maybe this is why I lost a little off the top end. I am going to order a set of 10 gram sliders and see how those act. They are cheap and easy enough to install that I don't mind getting a few different ones and maybe even running one set for flat Houston and another set for the rides we do in central Texas.

I guess I started the confusion because a thought a Vog 260 and the Linhai 300 were the same scooter just traded under different names. My reasoning for this was when the ECM (spark controller box) went out on the Linhai, ScooterTronix recommended the VOG-260 ECM because it was the same box with a 9k rev limiter rather then the 7200 rpm rev limiter on the Linhai. Somehow in that short telephone conversation I got the impression the scooters were the same, I guess not.

Anyways, my wife’s scoot is a 2008 Linhai 300 with 8 weights in the variator. I ordered 12 gram sliders thinking I had 14 gram rollers from the factory. I am the second owner, so there is a chance they changed them, although I doubt it. They just didn’t seem the type. I brought the original rollers with me to work today and they are all with .1grams of being 11gram rollers.

With this said, I now know why the bike feels flatter on the top end, like I stated in my original first impression of the sliders. I see your reasoning in why I should have gained a few mph by increasing the weight to 12grams sliders as well as the benefits of their geometry, but I don’t think the scooter is in a happy rpm range (no tach on the scoter) in the 60 – 70 mph range. It “feels” like it is one gear too high and just doesn’t have the power to push the wind. I compare this to a feeling of climbing a hill in overdrive in a car. My senses tell me the scooter used to have a few more rpm’s around 70 and was in a happier rpm power range to push into the upper 70’s on the chinometer. Now is just gets to 71 chinomiles, which is OK, but the flat power after 60 isn’t. It takes longer now to get from 60 -70 then before I installed the sliders. I see your logic and agree, I’m just expressing what my experiences are so hopefully this will benefit someone in the future.

So, where do I go from here? The trip to hilly central Texas is in 3 weeks. At the very least, I will put the 11 gram rollers back in. I hope Allword will chime in here as he too has a Linhia 300 with 11 grams sliders. I would like to know if he weighed the factory rollers. Also, my wife’s sister has a 2008 Linhai 300 she purchased brand new. I think I will ask her if I can weigh her variator weights. Option two is to go ahead and order a set of 10gram sliders and see how those perform compared to the 11gram rollers which were in the scooter when I got it. I like to tinker with stuff so I may go ahead and order the 10’s.

I may have a set of eight 20x12x12grams sliders for sale soon.

I LIKE the way you think. You are like a "used car salesman" and I couldn't resist your pitch. I just ordered the 10's. That is a great ideal to mix them.
Tim

Here is an update. While I was waiting for my new 10 gram sliders to arrive, my sister in law gave me the ok to take her variator apart and weigh her2008 Linhai 300 rollers. They were indeed 11 grams rollers and were identical to the ones which were in my wife's 2008 Linhai 300.

Ok, today the new 10 gram sliders arrived. I quickly disassembled the variator and immediately found a problem with the 12 gram sliders I installed. One of them had rolled over during the installation process and the flat slide was no longer riding against the plate. It was rotated 90 degrees to the way it was supposed to be. That probably upset the variator, and skewed my results and first impressions.

Anyhow, my entire mission was to make the scooter pull better in the hills for our central Texas ride in two weeks. I did NOT want to increase the weights, I wanted to decrease the weights so no need to mess with correctly reinstalling the 12’s. Out with the 12's and in with the 10's. It took approx 20 minutes to complete the swap.

All I can say is WOW!!! What an improvement over the factory 11gram rollers and my incorrectly installed 12 gram sliders. That scooter really "scoots" now. It launches off the line, pulls great all the way to 65, slows just a bit there and keeps going up into the upper chinese 70's, just like it did the factory weights, just MUCH faster. Now, when you are moving along and gas it, it almost feels like it downshifts, like a geared bike. It seems to rev up and go. Before, it just made a little more noise and slowly accelerated. I am very happy swapping 11 grams factory rollers for 10 gram sliders.

Now if I wanted to continue to play with different ratios, how can I mix and match the 12 and 10 grams sliders together. Do you have to do 4 and 4 for centripetal physics and balance, or could I start with just 2, 1 one each opposite side of the variator. I guess what I am saying here is I know how it ran with 11 gram rollers, so I don’t really want to do 4 10’s and 4 12’, because it would run very similar to the factory 11’s. I would like to play with the ratios between 10 and 11 just for fun and to satisfy my curiosity

Thanks for all your input guys….

I'm looking for 8ea 10gr sliders for my 250B, (like Earl has). All the sources I've found show a set of 6ea. Does anyone have a source for a 8ea pkg of DP sliders for the 250B. I believe they may be 20X12X10gr.