A Xingyue ITA150 owner answers questions....

[bluefront]

^^^^Sure looks the same on the exterior as a normal 150 GY6. The variator is 123mm of course, and here's the OEM belt.

[Rebel]

I think you may have just posted the reason you have a high top end;

"The variator is 123mm of course"

That's a big honkin variator. Add the 16 inch wheel and you have a lot higher final gear ratio than other scooters.

Kliff posted some measurements a while back from a stock variator and it was 107 mm, a Prodigy "Racing" variator was 114.7 mm, yours is 16 mm bigger than a stock and another 8.3 mm past the racing one, some big pulley there.

[bluefront]

Yeah this scoot has some pretty tall gearing......but I think all the 16" wheel scoots have a 123mm variator, even the water-cooled versions. I don't really know why though. You'd think the final ratio could be adjusted in the final drive gearing.

[leadsled]

What size sliders did you get for the variator, and where did you get them from? Would you mind posting a link? I have the BMS Pathfinder 150 (Just a rebadged Xingyue 150 ITA Cruiser) and would like lighter weights but they are not the same size as the typical GY^ 150. Thanks.

Aaron

[bluefront]

Link to sliders.......they are 10gr. The stock rollers are about 12gr (haven't measured). And they are slightly different size, but when I installed them, I didn't notice any extra play. There is no extra noise either.

But.....when I accelerate, the tach will go to 7K, rather than be stuck on 6K as with the stock rollers. The top speed doesn't appear to be affected......but I rarely go over 55mph. It's well worth the $20 to try them out. The job was easy.....

[bluefront]

I suppose you could call it a "back-fire retard plate".....but unless you really had backfire problems (I don't) it acts like an "airflow retard plate" instead. I've looked at my filter several times since I removed the plate....no problems found. The intake on this scoot has a 90 degree bend in it, as well as an expansion area.....I don't anticipate any problems.

I do like the idea of a good paper air-filter element, rather than the aftermarket foam replacements. The paper simply filters better. I put a layer of foam filter over the intake side of my paper filter....it's replaceable, and should keep the bigger crap from reaching the paper element.

I just passed 9200 miles the other day.

[bluefront]

Concerning the OEM opening into the airbox.....admittedly the opening is small, but very short. If that part of the system was long, there would be some noticeable restriction. As it is stock.....the intake air velocity at that point will just be faster. Restriction at that point...limited IMO. If you were racing this scoot it might make a difference.....I guess.

[bluefront]

To be 100% certain any intake modifications you make actually result in better performance (if that's what you're after), you need to establish a point of reference. The easiest way IMO.....a long, flat section of road, and somebody with a stop-watch. You'd need to make a number of runs (over the same distance from a stop) before and after any mods.

You think the intake is too restricted....try a run with the outer cover removed from the air box (secure the filter). You may have to re-jet the carb to get the scoot to run properly. Yeah you've removed one source of restriction.....but has it improved performance? Could be you've just made the scoot louder.

Another way......try runs up a long hill (from a stop).....observe how fast you're moving at a certain point (using your speedo). This is not as accurate as a stop-watch method, but easier.

[Rebel]

Znen makes a model called a Phoenix(type 05A), it is the same thing that Lance sold as their Phoenix model, A local guy here has a Lance version and has told me that his too is pretty fast for a 150cc. Like the ones you guys have, it has 16 inch wheels. It just amazes me that these scooters are so much faster than the smaller wheeled scooters. I originally figured it was just the wheels changing the final drive ratio, then Bluefront posted the size of his variator, that has to be a big help and it preserves the low end power. these guys are just getting it down to a very all around bike. Top speeds that can get you down a highway and not be blown over by a passing car. Tall wheels that improve the handling characteristics to be similar to a motorcycle and adds stability. Seems like a great formula to me.

Znen Phoenix

[Rebel]

now if some one that owns one of these gets adventurous, here is a link to a 128 mm variator, originally made for a 250 cc. I don't know if it would actually fit yours or not, but he posts a lot of specs on the variator and you could compare. Bige would probably know off the top of his head if it would work, he probably has them in stock.

cgi.ebay.com/ebaymotors/Scooter-moped-Variator-Assembly-CN250-172mm-engine-/300500272243?pt=Other_Vehicle_Parts&hash=item45f7364473

[bluefront]

China Motor Parts BMS has the 123mm variator listed.....$85 I think. I'd put up a link, but the site is down today. They also have most of the other parts for both the 150 and 200 ........ some of the prices are somewhat high, but at least they are available. I've ordered there before....no problems.

[Rebel]

that would be

www.bmsmotorparts.com/

[bluefront]

The BMS parts site is back up this morning. Doing a little research there.....here is the Pathfinder 200 cylinder.



The head/valves/cam from a 200 are listed as being the same as a 150 Pathfinder. So.....looks like upgrading your 150 to a 200 would only require a cylinder/piston/rings/gaskets. About $200 or so if you bought it here.

Keep in mind....this engine is not the same as the usual GY6 150. So you'd have to find the right cylinder to do the upgrade. The studs that hold down the cylinder are spaced differently.

I'm not sure the extra 30cc would be worth it for me. I might be tempted if/when I wear out my stock setup....

Note....all of this engine stuff has not been confirmed. I'm only going by the parts they list, and their compatibility between the 200 and 150. The crank for instance may be different. If anyone is really serious about this upgrade.....a call to BMS is in order, along with more research. Scrappydog may even have the pieces.

[Rebel]

I think they need a better set of calipers to show the bore on that puppy.

[Rebel]

slow day at work so I've been cruising the ebay listings. I found some specs on a 150cc GY6 variator and it seems they have 19 teeth (the regular GY6) the variator I linked to above has 21 teeth.