|
|
Post by cruiser on Jul 8, 2012 11:36:34 GMT -6
Welcome to Scooter Professor, Bill. Scoots are really a lot of fun, but can be high maintenance. Always nice to have a little challenge with the fun.  Glad you joined us! Cruiser |
|
|
|
Post by cruiser on Jul 7, 2012 12:31:06 GMT -6
The 14+ volts on the R/R red wire is good. Are you saying that the battery is showing 12.68 volts with the engine running? There is no increase when you jumper the diode? Sounds like you have a poor connection between the output of the R/R and the battery. I would not rule out the diode also, but you should check the wiring between the R/R and the battery first. May have to increase the wire size like many of us have already done.
|
|
|
|
Post by cruiser on Jul 6, 2012 12:10:17 GMT -6
Welcome to the forum fellow New Englander. Nice lookin' scoot. Too bad you couldn't find any yellow. ;D
|
|
|
|
Post by cruiser on Jul 6, 2012 12:02:22 GMT -6
I plan to take off the bowl to check out the main jet and the pilot jet. I have a kit of different size jets if I feel like changing things out. Probably will go with the installed ones since everyone seems to be having good results.
|
|
|
|
Post by cruiser on Jul 5, 2012 23:00:44 GMT -6
I actually ordered one from the vendor I linked to a little over a month ago. It looked good when I opened the box. I decided to install it on the scoot last weekend, but something didn't look right on close inspection.  The metal just above the idle mixture screw is flattened. The screw cannot be adjusted and the head of the screw is actually cracked in half.  The edge of the throttle bore has a slight flat spot which was enough to make the opening over .35 mm out of round. You can see how the flat spot lines up with the flat spot next to the idle screw. It looks like the carb was dropped or something was dropped on the carb. Really not that easy to notice. I emailed the vendor who responded quickly and gave me a number to call. I mailed the carb back and received a good one in 6 days. Hopefully I have good results like you guys have had. |
|
|
|
Post by cruiser on Jul 5, 2012 20:03:14 GMT -6
Hi grocerygetter. I believe THIS is the same as the one you have. |
|
|
|
Post by cruiser on Jul 2, 2012 21:06:18 GMT -6
Have a CH250 motor and a CN250 motor. Noticed that the piston head was different as well as the cylinder head - the CH250 has an H-B stamp on the cylinder head and the collar around the firing chamber is wider (less cant?) whereas the CN250 has an H-A stamp on the cylinder head and the collar is narrower (more cant?). The pistons are significantly different whereas the CH250 has a recessed top, the CN250 has a slight domed top. Apart from the visible differences, are the pistons interchangeable? Does the piston shape account for any performance differences, I've heard the Helix motors were more powerful than the elite models (probably from having to haul all the extra weight - no offense). I can add this next item to another thread if it's not the right place to discuss... but I've tried out the 13" front wheel with the disc brake on the CH250 front end and it all appears to fit... read a couple Yahoo Group threads about this, but it was inconclusive. I've noticed the'87 CH250 had a 10" disc brake, would it be better to go that route? Here's a little history on these engines that might help understand some of the differences. The CH250 was used on the Honda Elite. The CN250 was used on the Honda Helix which was a larger replacement for the Elite. The CF250 is a Chinese clone of the CN250 Honda engine. The cylinder heads of the CF250 and CN250 are supposed to be interchangeable which would probably mean that the pistons are also interchangeable. The CN250 was updated from the CH250 with a domed piston which probably necessitated a different cylinder head to ensure valve to piston clearance. The domed piston most likely gave a higher compression ratio which equals more power. Trying to use the CN piston in a CH engine might result in the valves hitting the piston. Using the CH piston in the CN engine would probably result in a loss of power due to lower compression. |
|
|
|
Post by cruiser on Jun 27, 2012 21:56:19 GMT -6
I tend to agree with JR on this being a gas problem. It sounds like gas is getting to the carb but not enough to supply the needs of the engine. Make sure that the fuel filter is clean and gas flows freely when vacuum is applied to the fuel petcock. I'm assuming that the gas tank is higher than the carb. Also check the vacuum line feeding the petcock is in good shape and not leaking.
|
|
|
|
Post by cruiser on Jun 25, 2012 19:20:38 GMT -6
|
|
|
|
Post by cruiser on Jun 23, 2012 21:40:11 GMT -6
Welcome to the forum, Ron. We look forward to hearing from you on your various projects. Maybe some will turn into rides for you?
|
|
|
|
Post by cruiser on Jun 23, 2012 21:35:06 GMT -6
How long have you owned this scoot? Has the cooling system always performed this way or has it gradually started running hotter? I haven't heard of many cooling problems with these scoots. It may be something that can be helped with normal maintenance like a good flushing and new 50/50 coolant along with some water wetter. It's a good idea to do this yearly or at least every other year if you are not running into problems. However, if the fan does not come on at the proper temp, then I would check out the fan temp sensor and the sensor lead connection on the radiator and replace or repair if necessary. This would probably be easier than running wiring and a new switch.
|
|
|
|
Post by cruiser on Jun 20, 2012 19:33:10 GMT -6
The CN250, CF250, CH250, and what is commonly known as the GY6 250 are all variations of the Honda clone 244cc engine. They are all vertical cylinder designs with variations occurring in the CVT area. Engine parts are pretty well interchangeable between all models.
The variator fan for the CF250 is 5.5 inches. The variator fan for the CN250 is 5 inches.
|
|
|
|
Post by cruiser on Jun 20, 2012 19:22:20 GMT -6
From the description of the valve adjustment, I would guess that it's a 257cc. Sounds like the engine is running sweet. The next question is concerning the carb. Did you replace the original? If so, what kind did you install and where did it come from?
|
|
|
|
Post by cruiser on Jun 15, 2012 18:44:57 GMT -6
Congratulations, grandpa. I'm happy to see that you are getting some riding miles in on your new scoot.
|
|
|
|
Post by cruiser on Jun 14, 2012 19:46:43 GMT -6
HERE is a site that sells clutch springs. These are for the Honda clone. Not too easy to find. If you have the Yamaha clone, I couldn't find anything even on the Roketa site. Maybe a 257cc owner can help? You there, JR?
|
|
