Engine overheating

[Arron947]

hello i was wondering if anyone could help me solve my problem : Got my bike finally started 2002 gilera runner 2 stroke 50cc and when i ride for about a mile it will heat up beyond reckignition there is water in the coolant bottle but its not cooling the engine down

thanks

[Trixie]

Is there any coolant or are you just running it on water?
____________________
Dead nobodies in company cars...

[Finglonga]

[Arron947]

no the radiator doesnt get hot and ive had the cap of the coolent bottle with the engine running and i have squeezed all the pipes to get the air out !

[Finglonga]

You need to check the thermostat then as it sounds like it isn't opening up when it gets hot. . . . Or drain and refill the cooling system to remove any airlocks.
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Andy Sez....
F.Y.Y.F.F.

[Arron947]

any chance you could tell me were that is on my runner

[panpan]

Or, your engine could be running very lean. This causes high temperature in the engine. Quite dangerous for the engine as well. What colour is your spark plug tip?

[Finglonga]

[Pete.]

Are you sure the engine is filled from the coolant bottle? Most are not, and the bottle could be full yet the engine is empty. Most are filled at te radiator filler cap.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[cheekythomas]

I would check the waterpump is working first of all.

Remove the drivebelt casing and make sure the small belt behind the variator is still there and in one piece...

...then remove the 2 main bolts holding the oil pump on and pull it off the gearcog, then remove the gear and make sure its all ok and it hasnt spun the middle out.

[panpan]

[Pete.]

Radiators aren't supposed to stay cool, they are supposed to get hot. If it's staying cool then either there's no coolant in it or the coolant isn't circulating.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Arron947]

[Noxious89123]

He means what colour is the metal electrode tip, not the insulating part of the plug
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[Arron947]

[Pete.]

Probably melted piston-crown from running very lean/hot
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Arron947]

[Runner07]

Had and basically still have the same problem with my Gilera Runner 2 Stroke 2002 model.

However it MUST be a Gauge mis-calculation because ive been driving it for 5 months solid with the Guage reading H for HOT.

Does it actually overheat? Or isit just saying its HOT? It could be just like mine and nothing to worry about.

But yeah, it could be a block, trapped air. Take it to your nearest workshop and have them look at it for you.

Can you confrim that it does Over-heat ?

[Arron947]

Yes i can comfirm because when i drive about a mile my engine will cut out and wont start untill it has cooled a little ! also when i put my hand near the cylinder head you can feel the heat !

I think the water pump has gone because i took the belt drive of and when i spin the water pump cog the water just pisses out from there

[panpan]

[aran2806]

Check there is no water in the oil. Had a similar problem with my aerox.