help 01 yamaha SX Viper over heating

millierx7 · 01-30-2012, 09:17 AM

Trying to help a friend out. Have a 01 Yamaha SX Viper. This sled will sit and idol for around 5 minutes then the over heat light comes on. Ive heard that this is a common problem any idea what could be wrong with this sled? new to Yamaha any info would be great.

millierx7 · 01-30-2012, 09:42 AM

Just got it running today started then there was a red light flashing on the dash. and the gauge was cutting in and out. tried to give it throttle just bogged out then back fired extremely loud and died. got it started again did the same thing.

mod-it · 02-02-2012, 07:46 AM

Need more info...

It isn't an '01 Viper, they didn't come out until '02.

The gauge cutting in and out could have simply been from a very low rpm because of the poor idle issue...the gauge will reset constantly when the idle is really low.

I assume the sled has sat for quite a while, like at least since last season?
If so, then carbs need to be gone through. Poor/no idle is a common sign of dirty carbs. Gas evaporates in the bowls while sitting over the summer, then we go to start them and all the crud that was sitting in the bottom of the bowls from the evaporated gas gets picked up by the new gas we prime into the bowls when pulling it over. Visualize a bunch of chunks swirling around in the gas. It then gets sucked into the jets and plugs them, especially the tiny pilot jets.

Never heard of a common problem on any sled where it builds enough heat after idling for 5 minutes to kick on the temp light. I don't think they would even if there wasn't any coolant in the sled. Viper warning indicator has a round, red light with a hazard triangle in the middle of it. When it comes on, there could be several reasons why. Below the light there are four different emblems, one of them will come on to indicate what the warning light is on for. If I remember right there is a fuel emblem, and engine, temperature, and oil. Check to see which one it is, most common is low fuel. Don't feel bad, many of us have thought is was temp or some other serious problem, only to realize it was simply low on fuel.

So: Clean the carbs, and verify what the warning light is on for.

millierx7 · 02-02-2012, 09:28 AM

This will bog out on the trails and not run right. no throttle response. and that red light pops on.

mod-it · 02-03-2012, 07:42 AM

Which still points at the carbs needing cleaned. Has that been done?

If this sled hasn't had much maintenance, the warning light could also be because of a pull-through on the power valves.

twincam88 · 02-03-2012, 08:49 AM

cooling system needs to be bled and check throttle cable tightness it might be the TORS cutting in.

millierx7 · 02-06-2012, 11:58 AM

just cleaned the carbs the pilots were clogged. started it back up the gauge would not read the idol was good was not to low or to high. the gauge would just flash the red light symbol. The tach itself just sat on zero, does the red light indicate something diffrent?

millierx7 · 02-08-2012, 07:22 AM

any ideas?

twincam88 · 02-08-2012, 08:21 AM

wires wore through under the motor? not sure if they fixed this for the vipers but the older sx's had this problem. are the heat exchangers warm or hot?

IQ600cf-i · 02-11-2012, 01:08 PM

Test out the stator, pull wiring harness from under the motor, very common rub through. I bet you its one or the other

01-30-2012, 09:17 AM	#1 (permalink)
millierx7 Super Advanced Member Join Date: Nov 2007 Posts: 265 Location: Ware, ma	help 01 yamaha SX Viper over heating Trying to help a friend out. Have a 01 Yamaha SX Viper. This sled will sit and idol for around 5 minutes then the over heat light comes on. Ive heard that this is a common problem any idea what could be wrong with this sled? new to Yamaha any info would be great.

02-03-2012, 08:49 AM	#6 (permalink)
twincam88 Super Advanced Member Join Date: Dec 2008 Posts: 604 Current Sled(s): 2010 nytro mtx Previous Sled(s): 99 sx700 Location: yorkton sk Favorite Riding Area: revy Age: 33 Riding Since: 5	cooling system needs to be bled and check throttle cable tightness it might be the TORS cutting in. __________________ wide open till you see god then brake hesitation means devastation

02-08-2012, 08:21 AM	#9 (permalink)
twincam88 Super Advanced Member Join Date: Dec 2008 Posts: 604 Current Sled(s): 2010 nytro mtx Previous Sled(s): 99 sx700 Location: yorkton sk Favorite Riding Area: revy Age: 33 Riding Since: 5	wires wore through under the motor? not sure if they fixed this for the vipers but the older sx's had this problem. are the heat exchangers warm or hot? __________________ wide open till you see god then brake hesitation means devastation

01-30-2012, 09:42 AM	#2 (permalink)
millierx7 Super Advanced Member Join Date: Nov 2007 Posts: 265 Location: Ware, ma	Just got it running today started then there was a red light flashing on the dash. and the gauge was cutting in and out. tried to give it throttle just bogged out then back fired extremely loud and died. got it started again did the same thing.

02-02-2012, 07:46 AM	#3 (permalink)
mod-it Super Advanced Member Join Date: Jan 2008 Posts: 123	Need more info... It isn't an '01 Viper, they didn't come out until '02. The gauge cutting in and out could have simply been from a very low rpm because of the poor idle issue...the gauge will reset constantly when the idle is really low. I assume the sled has sat for quite a while, like at least since last season? If so, then carbs need to be gone through. Poor/no idle is a common sign of dirty carbs. Gas evaporates in the bowls while sitting over the summer, then we go to start them and all the crud that was sitting in the bottom of the bowls from the evaporated gas gets picked up by the new gas we prime into the bowls when pulling it over. Visualize a bunch of chunks swirling around in the gas. It then gets sucked into the jets and plugs them, especially the tiny pilot jets. Never heard of a common problem on any sled where it builds enough heat after idling for 5 minutes to kick on the temp light. I don't think they would even if there wasn't any coolant in the sled. Viper warning indicator has a round, red light with a hazard triangle in the middle of it. When it comes on, there could be several reasons why. Below the light there are four different emblems, one of them will come on to indicate what the warning light is on for. If I remember right there is a fuel emblem, and engine, temperature, and oil. Check to see which one it is, most common is low fuel. Don't feel bad, many of us have thought is was temp or some other serious problem, only to realize it was simply low on fuel. So: Clean the carbs, and verify what the warning light is on for.

02-02-2012, 09:28 AM	#4 (permalink)
millierx7 Super Advanced Member Join Date: Nov 2007 Posts: 265 Location: Ware, ma	This will bog out on the trails and not run right. no throttle response. and that red light pops on.

02-03-2012, 07:42 AM	#5 (permalink)
mod-it Super Advanced Member Join Date: Jan 2008 Posts: 123	Which still points at the carbs needing cleaned. Has that been done? If this sled hasn't had much maintenance, the warning light could also be because of a pull-through on the power valves.

02-06-2012, 11:58 AM	#7 (permalink)
millierx7 Super Advanced Member Join Date: Nov 2007 Posts: 265 Location: Ware, ma	just cleaned the carbs the pilots were clogged. started it back up the gauge would not read the idol was good was not to low or to high. the gauge would just flash the red light symbol. The tach itself just sat on zero, does the red light indicate something diffrent?

02-08-2012, 07:22 AM	#8 (permalink)
millierx7 Super Advanced Member Join Date: Nov 2007 Posts: 265 Location: Ware, ma	any ideas?

02-11-2012, 01:08 PM	#10 (permalink)
IQ600cf-i Advanced Member Join Date: Feb 2012 Posts: 80 Location: michigan Favorite Riding Area: Upper, lower penninsula Age: 28 Riding Since: 1984	Test out the stator, pull wiring harness from under the motor, very common rub through. I bet you its one or the other

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