CRF450R radiator boiling and a cost effective solution.

**socialites** · 7th April 2011, 16:20

Originally Posted by scott411

we have run 1.6 radiator caps on most models with no bad outcomes, Kawasaki sell the cap, but we have since found a cheaper aftermarket one,

I must confess Scott, that if what I have already done fails, I will be looking at going to a "heavyer" radiator cap, and will come see you in this regard.

**socialites** · 7th April 2011, 16:21

Originally Posted by socialites

I must confess Scott, that if what I have already done fails, I will be looking at going to a "heavyer" radiator cap, and will come see you in this regard.

Shit, my spelling sucks...hahaha

**flyingcr250** · 7th April 2011, 17:57

Originally Posted by nodrog

http://www.redlineoil.com/product.aspx?pid=74&pcid=10

were do you get it from and how much?

**green machine** · 7th April 2011, 18:06

Originally Posted by flyingcr250

were do you get it from and how much?

From BNT it's about 30 bucks....

**Jay GTI** · 7th April 2011, 18:15

Originally Posted by green machine

From BNT it's about 30 bucks....

What, Bras 'n Things????

Oh you mean the other BNT... but cheers, boiled the Kato on Sat, so need to get some.

**barty5** · 7th April 2011, 19:37

Interesting reading for all the trail riding my yz450f has done and being stuck in long line waiting for people who are stuck its only ever boiled from when i myself have given it shit cause i was stuck guess they must have a better water flow/ radiators?

**flyingcr250** · 7th April 2011, 20:02

Originally Posted by barty5

Interesting reading for all the trail riding my yz450f has done and being stuck in long line waiting for people who are stuck its only ever boiled from when i myself have given it shit cause i was stuck guess they must have a better water flow/ radiators?

i remember seeing alot of water comming out your bike when mike and chris power took us on that ride at the farm

**porky** · 7th April 2011, 20:12

Originally Posted by socialites

Yeah, a radiator fan is the answer, and easily fitted to the crf450x which has a battery installed as it is an electric start dirt bike, but the R has no battery, so a battery pack will also have to be mounted somewhere, and a "puke" tank seems an easier solution in this case.

Dont need a battery to run a fan. Trials bike is the set up you want. Fan runs from thermostate (mines hard wired to a switch and by passes the thermostate) but has what i think is a capacitor ???? wired in, the fan is a 12v unit about 100mm made by matsuba. Not sure of the wiring etc on your bike or the voltage but hope this helps

**oldguy** · 7th April 2011, 20:25

does any retailer here stock this stuff.

#14 Kevin Windham use it.

http://www.amsoil.com/storefront/rdcb.aspx

**CRF119** · 7th April 2011, 20:41

You can also use a product called 2 Two cool oil additive reduces friction and engine temps. (Is Safe with clutches) I used it on my highly stresed CR125 with great success. I have not used it on my crf450. You must be going dam slow to boil it? I boiled mine doing the Wires loop and the problem is once it boils its very hard to get it cooled down. I use a radiator cap with a gauge on it to give an indication of heat.

Water wetter works great but only effective if you are moving still. Small thermo switch rad fans and a small battery pack would be a easy under $100 fix for stationary heat.

**pete.ktm** · 7th April 2011, 23:36

my 06 ktm 450exc tends to spew some fluid out on the slow stuff.

last ride i noticed my mates 08 450exc comes with a 1.8 radiator cap, mines a 1.4.

this thread got me googling and just came across this at ktmcyclehutt.com:

Radiator Cap 1.8 BAR
Price: $13.99
KTM Part Number(s): 77335016000

This cap comes stock on all 2008-2009 bikes. Can be used to replace lower 1.4 pressure radiator caps on KTM's older than 2008 to help prevent boil overs.