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Post by nulldevice on Jul 20, 2012 17:50:39 GMT -6
Are you leaving the throttle alone when you try to start it or are you making the mistake of opening the throttle while cranking it?
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Post by nulldevice on Jul 20, 2012 11:51:19 GMT -6
A simple setup for more power that worked for me.
1. Put 8000 miles on the scooter using regular motor oil for a complete break-in
2. Remove the carburettor main jet. start gently poking number size drills through it, flutes first, until you find the largest that will go through the hole. Go up one size and drill the jet out.
3. Take a 3/8 inch drill and drill a dozen or more holes in the air box near the air inlet. Use the stock air filter.
4. Change over to your choice of synthetic oil.
5. If your scooter has a square-ish like the Helix muffler, replace it with the cylindrical muffler with the hemispherical ends like the Reflex muffler.
Enjoy the 10 to 15 MPH gain in top speed from when it was new.
Edit:
One other trick, get good tires that are round and can be balanced. The stock ones that came with my scooter were awful.
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Post by nulldevice on Jul 16, 2012 19:38:18 GMT -6
A good example of dry humor.  35 litres is about nine to ten gallons.  |
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Post by nulldevice on Jul 14, 2012 10:15:19 GMT -6
Both outlets come from the same pumping chamber. I found the best way to deal with the second outlet was to route it back to the tank because I found capping off the second outlet raised the fuel pressure up too high for my scooter and caused erratic idle and low speed rich fuel mixtures.
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Post by nulldevice on Jul 6, 2012 18:44:06 GMT -6
I have mounted permanently a manual switch for the fan. If you have a temperature gauge you should be looking at it from time to time anyway. My scooter had the fan turn on before the thermostat for the coolant opened up.
You absolutely need to check the accuracy of your temperature gauge. Mine was showing overheating all the time but a non-contact thermometer showed motor temperatures to be normal.
The overflow tank needs to vent to the atmosphere. I don't recommend the bilge plug.
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Post by nulldevice on Jun 24, 2012 8:50:01 GMT -6
You can always cut into the oil line and install a T fitting for a pressure gauge port.
Or maybe you can find a banjo fitting to stack on top of the existing fitting, but that would require a longer mounting bolt.
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Post by nulldevice on Jun 24, 2012 8:45:07 GMT -6
That's correct Richard when it comes to the 257cc engine people just say linhai or yamaha/linhai. The hard part about all of this is the parts for instance one can google cn250 or helix clone 244cc engine like and say stator. The CN250 stator is supposed to have 18 coils but you can ask for a stator on the Tank 250 and it'll tell you the engine is a 244cc or even a CN250 clone and then you can find a statr listed at 17 coils for it? Same thing on the CF250. Best thing to do before you order a stator for the vertical clone engine is measure first and order second. I've not seen this issue with the linhai clone. JR I suspect the difference between the 17 and 18 coil stator is the 17 coil stator is for an AC magneto style ignition and the 18 coil is for the DC style ignition. |
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Post by nulldevice on Jun 24, 2012 8:39:31 GMT -6
First, make sure your idle speed and idle fuel mixture is correct. Too fast and the clutch will be partially engaged, too slow or bad mixture setting and the motor may not take up the load smoothly.
Check the springs under the clutch bell. There is more than one and you may have a weak or broken spring letting one of the friction shoes contact the bell at idle.
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Post by nulldevice on Jun 23, 2012 18:10:12 GMT -6
Today I found out a 14 dollar belt from Ebay is not a bargain. Less than five percent of the belt was on the scooter by the time I got stopped. I stopped under a nice shade tree, removed the remaining belt fragments and shreds, and put the spare belt on. I carry a belt from a long case 150cc gy6 motor as a spare. It is longer and narrower than the stock belt on my CN250 clone engine. It can be put on my 250cc scooter's pulleys without removing the variator. Think of it as a temporary spare like cars have. |
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Post by nulldevice on Jun 17, 2012 14:06:20 GMT -6
I got a digital meter from Ebay, and before I installed it I put it in a pan with ice cubes and it read 2 degrees C. I then put it in a pan of boiling water and it read 90 degrees C. I know it is time to worry when the thermometer reads over 110 degrees C. Until then everything is good.
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Post by nulldevice on Jun 10, 2012 20:25:49 GMT -6
I fixed my seat latches. There is a U shaped piece of rod embedded in the seat pan. I pulled those out and no more seat latch troubles.  |
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Post by nulldevice on Jun 7, 2012 13:31:00 GMT -6
The gauges on the Chinese scooter are merely animated decorations to get DOT approval. You may very well not have had an overheating issue.
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Post by nulldevice on May 24, 2012 20:48:25 GMT -6
I would get a spray can of engine degreaser and use that. After it sits a few minutes you spray it off with a garden hose. Much lower pressure, less likelihood of getting soap and water past seals and into electrics or bearings.
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Post by nulldevice on May 24, 2012 9:28:51 GMT -6
Mine were similar even on my Bali 150 and to me it seems as if the inside rubbers were stiff or something and the fluid was very dark too even though I replaced it when I did the PDI. So I flushed all my brakes out and as I did it I added a little brake cleaner to the fluid and then I replaced all the fluid with the Prestone synthetic type brake fluid and bled them very good and man my brakes now are soft and will stop on a dime. If it goes down that far you've still got a air bubble or two in it. JR Is that a special brake fluid cleaner additive, or what you would use on the outside to clean the parts? |
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Post by nulldevice on May 23, 2012 19:29:12 GMT -6
That is an awesome deal! givin the fact that i sell em here at my store for about that price but it dont come with all of that! over &1200? I haven't figured out if you guys are making a big joke of that Ebay seller or if the wrong page got posted here. For that price the motor should include a complete scooter, shipping, and a few hundred dollars change. |
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