klr running hot

ridenfiddle · 08-11-2008, 06:21 AM

rode with a friend and his new to him klr 650,do they always run hot at slow dirt speeds?his seemed to do it consistently,the radiator was full,but could hear water boiling

GaThumper · 08-11-2008, 06:43 AM

Is his fan coming on? My fan comes on a lot when riding slow tight woods. Not enough airflow to keep it cool at low speeds, I guess. The fan will stop working if the bike is dropped on that side and the fan gets pushed up against the radiator.

There is a cooling mod that consists of filling the gap between the radiator shroud and the radiator to force more air through the radiator. Just google KLR Cooling Mod for plenty of info and pics.

Dharuma · 08-11-2008, 07:06 AM

I'd check the thermostat on the bike. Does the fan run at all?

Jaseun · 08-11-2008, 09:44 AM

Whenever I've had boiling symptoms its been a leak in the system. First check is the radiator cap. -Jason

nofate · 08-11-2008, 10:01 AM

If the rad is plugged up with mud or bugs... clean it.

Old Kiwi#99 · 08-12-2008, 01:40 AM

KLR cooling system is pretty crude. Not enough cooling at low road speed and too much at high speed, and the temperature jumps all over the place. It can be improved a lot using this guys product:
http://members.cox.net/watt-man/TB%20Testing.htm

DWalt · 08-12-2008, 03:59 AM

Check the water pump impeller bolt!

drklr · 08-12-2008, 04:30 AM

Quote:

Originally Posted by ridenfiddle

rode with a friend and his new to him klr 650,do they always run hot at slow dirt speeds?his seemed to do it consistently,the radiator was full,but could hear water boiling

I've ridden mine in an enduro in the heat of summer at a blistering rate of almost 1.5mph and the fan was on a lot but I never heard the water boiling. I would make sure the fan is working.

on2wheels52 · 08-12-2008, 05:32 AM

None of mine have never boiled either, just lots of fan action when going slow. Something must be amiss on your buddy's bike.
Jim

08-11-2008, 06:21 AM	#1
ridenfiddle ^OP n00b Joined: Jul 2008 Oddometer: 2	klr running hot rode with a friend and his new to him klr 650,do they always run hot at slow dirt speeds?his seemed to do it consistently,the radiator was full,but could hear water boiling

08-11-2008, 06:43 AM	#2
GaThumper Road Less Traveled Joined: Jun 2006 Location: Thumpin' in North GA - headin' for the Smokys Oddometer: 457	Is his fan coming on? My fan comes on a lot when riding slow tight woods. Not enough airflow to keep it cool at low speeds, I guess. The fan will stop working if the bike is dropped on that side and the fan gets pushed up against the radiator. There is a cooling mod that consists of filling the gap between the radiator shroud and the radiator to force more air through the radiator. Just google KLR Cooling Mod for plenty of info and pics. __________________ Dirtly: 2009 Suzuki DR650SE Road Sofa: 2001 Yamaha (ad)Venture 1300 Dirtlier: 1999 Suzuki DR350SE Old Sport: 1979 Suzuki GS1000E 1996 Suzuki Intruder 1400 (for sale) 1987 Yamaha TT600 (for sale)

08-11-2008, 10:01 AM	#5
nofate what blackflies? Joined: Nov 2005 Location: Chapleau, ON Oddometer: 2,635	If the rad is plugged up with mud or bugs... clean it. __________________ Rick, Chapleau, ON Triumph Scrambler 900 Honda Trail CT90 Flying with Rick float plane video: http://www.youtube.com/watch?v=g6my0FM9F_Q

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08-11-2008, 07:06 AM	#3
Dharuma The Dude Abides Joined: Dec 2007 Location: San Antonio, Texas Oddometer: 180	I'd check the thermostat on the bike. Does the fan run at all?

08-11-2008, 09:44 AM	#4
Jaseun Gnarly Adventurer Joined: Sep 2007 Location: Annapolis, Maryland USA Oddometer: 354	Whenever I've had boiling symptoms its been a leak in the system. First check is the radiator cap. -Jason

08-12-2008, 01:40 AM	#6
Old Kiwi#99 Gnarly Adventurer Joined: Nov 2006 Location: Middle Earth, New Zealand Oddometer: 244	KLR cooling system is pretty crude. Not enough cooling at low road speed and too much at high speed, and the temperature jumps all over the place. It can be improved a lot using this guys product: http://members.cox.net/watt-man/TB%20Testing.htm

08-12-2008, 03:59 AM	#7
DWalt Drama Hater Joined: Apr 2004 Location: At the Dew Drop Inn. Oddometer: 3,639	Check the water pump impeller bolt!

08-12-2008, 05:32 AM	#9
on2wheels52 Beastly Adventurer Joined: Jun 2006 Location: northern Arkansas Oddometer: 1,860	None of mine have never boiled either, just lots of fan action when going slow. Something must be amiss on your buddy's bike. Jim __________________ R1200GS Ural Patrol KLR650 DRz400 XL185 Austria '08 http://www.advrider.com/forums/showthread.php?t=352082 Back to the Alps in '11 http://advrider.com/forums/showthread.php?t=744205