Stan-status of your 250

[scooterollie]

Stan;
Few of question about the cooling system of your 250:
-How has the cooling system performed since your last post?
-Did you ever inspect the pump and was there any damage?
-What do you think about the quality & dependability of the fan?
-Think there are any substitutions using fans from name brand machines?
Thanks!

[russ553]

The radiator cooling fan from the KYMCO People 250, Xciting 250 or Grand Vista 250 will work on the Tank 250, Roketa Bali 250, Viva 250 and others

The part number is 19030-KHD8-900. Motor Assembly Fan.

Russ

[90GTVert]

The Kymco 250 has a few similar parts, but a very good match to most of the Chinese 250's is a 92 Honda Helix. This scooter uses the engine that the new 250's "borrowed" theirs from.

BTW, I've ordered both the service manual and parts manual for the Helix, which I expect to receive in a day or so. Hopefully, these will provide us with far more information for parts and trouble shooting on the 250's. I've purchased 2 parts from Honda for my scooter, and both were exact matches. Stan

russ553 said:

The radiator cooling fan from the KYMCO People 250, Xciting 250 or Grand Vista 250 will work on the Tank 250, Roketa Bali 250, Viva 250 and others

The part number is 19030-KHD8-900. Motor Assembly Fan.

Russ

[90GTVert]

I've just about concluded that the problem many are experiencing is either a crappy gauge or the sending unit at the thermostat housing. I plan to order a new sending unit from Honda to see if that will cure the high readings, but I really suspect it's the gauge. Now if some electronic wizard out there knows if there is a simple cure such as an in line resistor, I'm all ears. I have not found any disturbing temperature readings on the scooter, so I really don't believe the problem is anything else, but I'm still fussing with it too. Stan

scooterollie said:

Stan;
Few of question about the cooling system of your 250:
-How has the cooling system performed since your last post?
-Did you ever inspect the pump and was there any damage?
-What do you think about the quality & dependability of the fan?
-Think there are any substitutions using fans from name brand machines?
Thanks!

[jackthefuzz]

go down to your local autoparts store and get temperature crayons or temperature dots. get them in 3 temperatures ranging from 175 to 225 and put them on the cylinder and see if any of them trip and if so what ones. easy to do and will confirm for sure if the engine is actually overheating.

For a couple bucks you can take all the guesswork out of it and maybe not waste money on new senders

[scooterollie]

Stan;
I have been wondering if it would be wise to replace the sending unit, thermostat, and radiator cap with the Honda issue parts. Not certain I trust the fan for the long haul, either. Don't want to throw money at it but also don't like to be stranded. On the other hand, will we get the same "Made in China" parts from Honda?

jackthefuzz, never heard of temp. "Dots" or "Crayons" but they sound interesting!

[90GTVert]

I have not tried the sending unit yet, but the cap and thermostat seem to be fine. The parts that I have gotten from Honda are almost identical, but you can feel a difference. Usually, this is because of the material used, which I suspect is superior in the Honda parts. I doubt they get the fans from China, but it's always a possibility. The one thing you can count on is that even if it's made in China, Honda is very strict about quality control and staying withing specifications. I'm more interested in solving the high temp readings than throwing parts at the problem, but I will eventually find the cause and cure it (or blow the scooter up trying). Stan

scooterollie said:

Stan;
I have been wondering if it would be wise to replace the sending unit, thermostat, and radiator cap with the Honda issue parts. Not certain I trust the fan for the long haul, either. Don't want to throw money at it but also don't like to be stranded. On the other hand, will we get the same "Made in China" parts from Honda?

jackthefuzz, never heard of temp. "Dots" or "Crayons" but they sound interesting!

[90GTVert]

You'll exceed 200* on an iron cylinder and the aluminum head. The question is really the operating temp rather than surface temps. I've used a laser thermometer on the head, cylinder and radiator surface. Nothing is in the dangerous range that I have found. I'm convinced the issue is merely the reading the gauge presents, but I still want some coolant readings. Stan

jackthefuzz said:

go down to your local autoparts store and get temperature crayons or temperature dots. get them in 3 temperatures ranging from 175 to 225 and put them on the cylinder and see if any of them trip and if so what ones. easy to do and will confirm for sure if the engine is actually overheating.

For a couple bucks you can take all the guesswork out of it and maybe not waste money on new senders

[jackthefuzz]

scooterollie said:

Stan;
I have been wondering if it would be wise to replace the sending unit, thermostat, and radiator cap with the Honda issue parts. Not certain I trust the fan for the long haul, either. Don't want to throw money at it but also don't like to be stranded. On the other hand, will we get the same "Made in China" parts from Honda?

jackthefuzz, never heard of temp. "Dots" or "Crayons" but they sound interesting!

the crayons are cool. at a set temerature they change color or change from chalky to glassy so its easy to tell if that temperature has been reached. you can buy them in increments up to something like 600F. the dots simply stick on to the surface you want to monitor and pop if the temperature is met or exceeded. Outboard manufacturers use it to see if the customer has run the engine dry and many builders use them to make sure temperature is even across a head, make sure there is good coolant circulation and there are no hot spots