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Post by rsw1158 on Aug 27, 2013 18:51:37 GMT -6
Ok. The jet kit I bought is here www.ebay.com/itm/330924146366?item=330924146366&viewitem=&vxp=mtr. I don't think I will get around taking any pics of the work I did on my scoot because I don't want to tear it down again. But I can tell you pretty easily what I did. Remove your air box completely from your scoot. Leave the u-shaped air intake tube hooked up to your carb. You install a 32mm foam filter on the intake end of the tube. I got mine from Scrappy Dog Scooter. There will be a tube from your rear gear box you disconnect from the air box. Just wire it up some where and leave it be or put a small gas filter on the end of it to keep contaminates out. There will also be two other small hose connections to your box. One is the crank case vent hose. That will be the fat hose with no tee in it. That is where you install the PVC. I hung mine on the frame work on the outside of the seat bucket above the head of the engine. You can leave it be or put a filter on that. When you put the plastic back on, no one can see it. The other hose connection will have a tee on it. One line goes to the canister and the other to the reed valve at the exhaust. I just put a filter on that and hung it up under the plastic out of sight. Done. So far the scooter has been running great. I bought it new 5 weeks ago and have 1600 miles on it already. 1200 miles have been without the air box because my oem air filter broke and was rattling around inside my air box and I have been waiting for the dealer to send me a new warranty filter. I don't think I will be installing it when I get it. I like it the way it is. Faster, quicker, and easier to work on now. When you rejet, you don't have to take your carb all the way out. Just disconnect enough stuff so you can turn the carb upside down and take the bowl off. I hope this helps. |
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Post by rsw1158 on Aug 27, 2013 16:21:26 GMT -6
Alley has the right one. That's where I got mine.
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Post by rsw1158 on Aug 27, 2013 16:20:21 GMT -6
Just a note. The flexible one won't work for this application.
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Post by rsw1158 on Aug 27, 2013 16:17:59 GMT -6
It is a bit expensive. But, if you have the style scooter listed and have tried to adjust your carb after you remove the tamper proof cap, it is well worth the investment. I tried the other bent long tool shown and I couldn't get it to work. Too tight of quarters. You also have to remove the air box to make the adjustment. You can only get to it from the left side of the scooter. I bought my tool on e-bay for about 50.00. I'll check to see where I got my jet kit. I don't remember off hand where I got it. It has an assortment of 10 jets from 105 to 140 I think. It was very reasonably priced. I'll post again with more info on your questions.
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Post by rsw1158 on Aug 26, 2013 13:39:48 GMT -6
This is the one I use and it works great. If you have a YY250T or a scoot of the same, it will make your life a lot easier if you remove the air box, install a pvc valve on the crankcase vent tube and make sure it is higher than the top of the engine, rejet your carb to about a 115 or 120 jet,( I'm using a 120 ) and install a foam free flow air filter and use the u shape air intake tube from the original air box. Your total performance and top end speed will be greatly increased. I gained about 10mph top end and my take off speed is a lot better. The only other mods I did on this scoot is a red hot coil and an iridium spark plug. Attachments:
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Post by rsw1158 on Jul 25, 2013 17:31:39 GMT -6
Now that I know this is just a fancy variator I just need to figure why it won't slide all the way off. I tried using some serious force but like I said it slides more than 1/2 way off then stops like it hit a wall.
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Post by rsw1158 on Jul 23, 2013 20:50:07 GMT -6
Here is a pic of what I have. Attachments:
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Post by rsw1158 on Jul 23, 2013 20:40:41 GMT -6
This variator is like a sealed unit. It has the nut and the outside slide plate that comes off which I did but the other part with the rollers in it is like a sealed unit. When I tried to pull it off the shaft it will only go so far and stop solid. I'll try and find a pic of it.
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Post by rsw1158 on Jul 23, 2013 20:23:53 GMT -6
I was checking out the variator and to me it is a strange beast. As a matter of fact, I couldn't pull it off the shaft. I couldn't figure it out. So I did a little searching and it is the same thing Honda uses. But, I couldn't find anywhere to tell me how to pull it off. Help?
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Post by rsw1158 on Jul 23, 2013 20:06:54 GMT -6
I did check the variator when I had it tore down. The belt is riding about an 1/8" or less from the outside. That is at max from my experience. But it achieves that at rather low rpms, around 6k or a little less. So, the scoot is performing very well before getting to it's power band. I kinda like that. My 150 has to run at full throttle and 7.2k to do 60-65mph. I did get more mid range power just by drilling my jet out on my 250. Still getting 70mpg. I am happy with the top end but if I can get more, I'll take it.
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Post by rsw1158 on Jul 23, 2013 19:25:28 GMT -6
I've been a scooter owner for over 5 years. I started out with a 50cc, then a 150cc Bali that I still have, and now my 250. I know a few things about them and did some mods on my 150 to achieve 65mph. So, I do know my way around these creatures but not so much with the water cooled 250s. Yes I did change my fluids and I had this thing torn down to frame and engine to completely check it out. This is the 244cc engine. This is a real pain to try and do a fuel air mix adjustment. This scooter feels like it has enough power to handle higher road gears for more top end. Just wondering if anyone has tried that on these scoots and what the results where.
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Post by rsw1158 on Jul 23, 2013 13:35:34 GMT -6
Just received my 2013 Roketa YY250T scooter last Thursday. I'm in the breaking in period at the time and I am very curious about something. Some brands of the same body 250 scooters can do 80mph or so and others around 70mph. What is making the 80mph scooters go that fast? Is it the final drive gears? I checked for restrictions on my scoot and didn't really find any except for the tiny 108 main jet that I drilled out to about 120. After driving it 300 miles, I can tell that it can go a little bigger yet. Still a little lean. I would like to get some tech. input on this subject because most of my driving is highway driving.
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Post by rsw1158 on Jul 17, 2013 13:07:19 GMT -6
Sounds good, thanks.
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Post by rsw1158 on Jul 16, 2013 15:55:55 GMT -6
If you are still using your stock restricted muffler, you will have a tuff time getting your carb just right. You opened up the air airway in so you have to open the airway out.
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Post by rsw1158 on Jul 16, 2013 15:51:50 GMT -6
I agree with carefulrider. Take your clutch apart and remove the debris and clean it. Sounds like all problems are there.
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