15 gram sliders in a Linhia 257cc (260) By 4950cycle (Read 2,184 times)

[4950cycle]

I am asking if anyone ever put 15 gram sliders in their Linhia 257 cc scooter ? And if so could you tell me the effects they had on your scooter good or bad. Or , If you have experimented with any weight sliders and feel like posting your scooter's loss or gains it would be greatly appreciated and enlightening to some of us.

[cloudsifter]

Just hopped over here from my thread to see what you have for a scooter.

After having my Linhai Aeolus 300 for awhile-I went from what mine had in it (14gram)rollers to Dr Pulley sliders at 12g. I noticed improvement (when I did it 2yrs ago) but I wasn't scientific about it. I'm not home right now, so can't quickly find a post explaining regarding going up or down in weights. I could find the video on YouTube in a bit when I get home if it might help, as well.

I'm sure the info is in this form somewhere too but not being at home this is the quickest thing I could find in another form using a Google search.

www.apriliaforum.com/forums/showthread.php?t=8960
in that thread it talks about the different weights and the purposes for changing.

[4950cycle]

I had some trouble this week that stopped the scoot. I had to put a fuel pump in her. So far it looks like it fixed the problem . Then put my scooter up on the center stand and took it up to the rev limiter a couple times to find out where it topped out. The RPM went up to about 8400 without breaking up at all. Any higher and the RPM was unstable. But it would go up to about 8700 as indicated on the not so precise scooter tach. What that means is I might get my 5 mph on top if my variator isn't maxing out already. And 16.7 HP will haul my 260 lbs any faster than it already will go. While I've got the belly and side exposed I am gonna do a much needed valve adjustment. " Again " About the 4 th one I've done. "THEN" next on the agenda will be that Marking the inside of the variator test we talked about. Thanks for the info cloudsifter.

[4950cycle]

Aug 9 2016 at 6:10pm jct842 said:
First thing I would look at is the rpm at the top speed you get now. Depending on if it is wound out or not to decide on what weights you have and what you need to go to. If you don't have a tach get one on there. If you are a whole lot under red line you need to go lighter in weights which is what I would suspect.

Doubt if you will be happy with a larger carb with out doing other mods to go with it. Jetting is usually all that is needed.

Folks, Take jct842's post to heart ! And do not buy a 32mm (BS) more like 31mm racing carb they call it. The one I got has at least a 125 main jet which is way to big unless you are gonna mod the rest of the breathing system and maybe even port and cam it. Just do what he says. Don't be a Hard head like me.

Read more: scooterdoc.proboards.com/thread/13008/mph-more-top-speed-mp250a#ixzz4I4lXi1wE

[4950cycle]

Get this, After all this I put my 115 main out of my old Jap 30 mm carb in the new 32 mm , New carb ran great then ! But no better readings from the tach and speedo than my old carb. I think it had a sleight edge on my old carb in the mid range. But not enough difference to change much. So what that means is if they will take this 32 mm back I want a refund.

[4950cycle]

Aug 17, 2016 14:59:30 GMT -6 cloudsifter said:

Just hopped over here from my thread to see what you have for a scooter.

After having my Linhai Aeolus 300 for awhile-I went from what mine had in it (14gram)rollers to Dr Pulley sliders at 12g. I noticed improvement (when I did it 2yrs ago) but I wasn't scientific about it. I'm not home right now, so can't quickly find a post explaining regarding going up or down in weights. I could find the video on YouTube in a bit when I get home if it might help, as well.

I'm sure the info is in this form somewhere too but not being at home this is the quickest thing I could find in another form using a Google search.

www.apriliaforum.com/forums/showthread.php?t=8960
in that thread it talks about the different weights and the purposes for changing.

A Honda Reflex clone with a 260 Linhai (Yamaha style engine).

[cloudsifter]

Maybe some of these vids would help. 

[4950cycle]

Thank you for all the help here cloudsifter. Took me a while to get the scoot running good . No sense in worrying about sliders and rollers if the engine isn't even running good. Had to adjust valves and drill a vacuum fitting out that was restricted I believe. I did something right because it runs right again. Anyway, I have the variator cover off and the the variator marked real good. It doe's seem to have a weak spring on the clutch pulley (rear) to. I can move it in and out fairly easy. Should it be like that ? A stronger spring would give me real good take off and low speed power. But I don't want it to keep my variator from letting my belt go all the way out either at top speed. But one thing at a time. First the variator check.

[cloudsifter]

Aug 31, 2016 21:31:34 GMT -6 4950cycle said:

Thank you for all the help here cloudsifter. Took me a while to get the scoot running good . No sense in worrying about sliders and rollers if the engine isn't even running good. Had to adjust valves and drill a vacuum fitting out that was restricted I believe. I did something right because it runs right again. Anyway, I have the variator cover off and the the variator marked real good. It doe's seem to have a weak spring on the clutch to. I can move it in and out fairly easy. Should it be like that ? A stronger spring would give me real good take off and low speed power. But I don't want it to keep my variator from letting my belt go all the way out either at top speed. But one thing at a time. First the variator check.

Well, I have to say that I don't know the answer to that.

[4950cycle]

I took apart and cleaned my stock 8 yr. old Jin Bo fuel pump because it stopped working a couple days ago . I ordered a new fuel pump of the same make and it showed up today. The old one worked after I took it apart and cleaned it up and the scoot ran good, even at top end. But today I went out to start it up to test my marked variator and the fuel line was dry AGAIN. And I couldn't get it to pump fuel (see through line) as I cranked it over. Then this tropical storm finally got here to north central FL. and stopped the whole show for the rest of the day and probably tomorrow too. It's a real big slow, slow moving storm. When it finally quits I will throw this new fuel pump on and hopefully it will solve my new fuel supply problem. Then I will test my marked variator. I have my JCL all stripped down with my variator cover off even. I can't wait to test it and then pull my variator apart to weigh my rollers to see which way to go on slider weight..

Read more: scooterrebels.proboards.com/thread/2683/gram-sliders-linhia-257cc-scooter#ixzz4J3R6LPYT

[4950cycle]

Got the scooter running good with all new fuel delivery parts. Hoses, Right size pump and such. Carb has no issues and away we go. Did the marker variator test and came up just under a 1/4 inch from full belt Diameter at top speed (67-68 mph right now)on said variator. Hovering around 6700-6800 RPM. Max hp is supposed to be at around 6500 RPM on 257cc Linhia. That being said I think I could go up a gram to 15 gram sliders. BTW My stock rollers are the typical for 250 Linhia 14 gram rollers. If 15 gram sliders make it a bit sluggish (a little heavy) I could always drill a half gram or so out on each slider. Any input Guys ?

[4950cycle]

Halt on getting sliders or rollers to get more top end on a Linhia 250-300 cc. Turns out the results from my variator marker test ( the point my belt came out to on variator ) is as far as my variator will go for top end. Heavier sliders / rollers can not overcome the mechanical road blocks that are built into my Linhia 257 cc variator after I took a super close look at how it works . "BUT" with some modification to the variator I'm expanding the diameter that it can push the belt out to. So that's why no one would tell me on any of the forums how the slider mod would help or it turns out " Not " help me to get more top end. 15 gram or any other slider weight can not increase top end until you do these couple of simple mods to the variator. Sorry, no pics yet because my camera is down and my cell doesn't take pics, But soon though if anybody is interested. Best of all it cost no $ if you have the right shop tools around.

[4950cycle]

Now going in another direction which would be better acceleration . I would think that could be done simply by going a gram or two lighter on rollers or even better sliders. And I would bet you could still achieve full contraction on the variator which would give you your same top speed as before the weight change as long as you don't go to light on the rollers / .sliders

Read more: thescooterprofessor.proboards.com/thread/4569/gram-sliders-linhia-257cc-260#ixzz4KTfWBP00

[4950cycle]

My idea worked on the variator. I worked on it late yesterday afternoon and today. Finally by nightfall tonight I got the modded variator back on the JCL 250 up and running. Well... up and running on the center stand anyway. I wanted to do a static test first to see what the variator was doing and at what RPM. I got my belt all the way out now at about 6600 RPMs I believe. It was getting dark so I didn't see so good even with a drop light. I will redo it tomorrow. I drilled out 1/2 of the 14 gram rollers down to 12 grams. so I have an average of about 13 gram rollers. Truthfully I don't even need sliders now since I'm getting full range with these old beat up drilled out rollers. But I will still buy a set just to complete my refurbishing the variator dealy. The real test is will the belt go all the way out on the variator with my 264 lbs. butt on it. That will be tomorrow to see if I can get any more top end out of it.

Read more: scooterrebels.proboards.com/thread/2683/gram-sliders-linhia-257cc-scooter?page=1#ixzz4KaF4iN6n

[4950cycle]

Well, I gave it a run test and it only gained about a 1-2 mile per hour. And I lost a pinch of my Jack rabbit start / Hole shot ability. Now it gets up to about 10 MPH before it starts really scooting. Don't get me wrong, It's still plenty acceptable on take off. But it really used to jack rabbit out of the hole before. But, Just remember this was the very first test run. And it never attained 6500 rpm where my max HP is. For some reason I couldn't get it to climb above 6000 rpm at top speed. Can't explain this yet since I actually lightened my rollers which should have made me run higher RPM across the board. I did booger the rollers up a bit when I drilled those 4 I drilled. Maybe they are fouling up a bit trying to very my variator. So, Now I'll have to order those 12 gram sliders I had my eye on to see if that will make it all work ? PS I bet it would FLY LOW with somebody 170 lbs or less on it though right now. Remember I'm 274 lbs. and a head into the wind now.

Read more: scooterrebels.proboards.com/thread/2683/gram-sliders-linhia-257cc-scooter?page=1#ixzz4KiUk0tXn