What oil is best? and what ratio?

[CR888]

I've ridden with many good enduro/track riders. Only ridden with one guy who could ride a 500CR to its potential. Weapon!

 

[bwalker]

I can't ride it to its potential, but my racing days are long gone and it does put a smile on my face everytime I roll the throttle on.

 

[smokey7]

I have ridden a couple 500 and when they get on the pipe just makes me smile. Some amazing torque and power. Totally a different type of a experience then a 450 thumper.

 

[CR888]

I wish they were still racing 500 GP bikes....they really sorted out the men from the boys. The new 4T 1000's are too nice to ride. I think a requirement to be a good 500 rider is to have no imagination of risk and believe your capable of dealing with anything thrown at you. Being a stubby or two short of a six pack probably helps.

 

[smokey7]

With a 500 you can hurt yourself very quickly. One of the nastiest 500s iv ever Road was I thinking 89 that thing was much nastier than the later ones I've ridden. Don't know much about them except I want one.

 

[CR888]

Mmmmm....500's, really let you know when the power comes on. Not many bikes want to lift the front wheel in every gear. As much as I luv em, my YZ250 is pretty good and my XR650R is a comfy smooth bike that don't wanna kill me, wish it had electric start though!

 

[Brewz]

@CR888 do you know Mick Frasier?
Rode Ducati superbikes

 

[Terry Syd]

I loved the power to weight ratio of open class bikes, but the biggest problem was traction - you know the old 'power to the ground' issue. I spent a lot of my time with my butt stuck out over the fender trying to pick lines with the most traction.

I remember Geoff Eldridge of ADB fame took a KX-500 out to the drag strip in Sydney and ran it against all the weekend cars - he was running knobby tires and smoked the lot of 'em. He kept coming around to have another go and the guys were shying away as they didn't want to be humiliated.

 

[Brewz]

Oil.

I had an interesting conversation with a bloke yesterday,

He has done a lot of work with 2 stroke dirt bikes.
His opinion was that in a chainsaw, its best to run a good fully synthetic oil at 50:1 as this is loads of oil for the application and that this made more power too.
Theory is that less fuel and more oil through a given jet size means less fuel so less power.
He recons it also means more oil creates a lean environment that makes the saw burn the oil causing it to char and increase wear?

Thoughts?

 

[bwalker]

Oil.

I had an interesting conversation with a bloke yesterday,

He has done a lot of work with 2 stroke dirt bikes.
His opinion was that in a chainsaw, its best to run a good fully synthetic oil at 50:1 as this is loads of oil for the application and that this made more power too.
Theory is that less fuel and more oil through a given jet size means less fuel so less power.
He recons it also means more oil creates a lean environment that makes the saw burn the oil causing it to char and increase wear?

Thoughts?

Sounds like he is a few sticks short of a load.

 

[bwalker]

With a 500 you can hurt yourself very quickly. One of the nastiest 500s iv ever Road was I thinking 89 that thing was much nastier than the later ones I've ridden. Don't know much about them except I want one.

The bike I am on had an 89 motor in it. The secret to controlling a 500 is by learning to ride the bike a gear high. If you try to ride it like a 250 you just end up tiring your self out.
I don't find a cr500 to be hard to ride at all. It actually makes you a lazy rider, kinda of like a four stroke.

 

[smokey7]

Oh yea over gear and use the torque. I know what you mean with them making a lazy rider they just make up tor skill from the power they.

 

[KenJax Tree]

I got a free 5 gallon bottle of Red Armor at the dealer today. I asked about it and he gave me a bottle to try, he said if you like it i'll cut you a good deal on it.

 

[junkman]

I got a free 5 gallon bottle of Red Armor at the dealer today. I asked about it and he gave me a bottle to try, he said if you like it i'll cut you a good deal on it.

That was nice of him to give you 5 gallon bucket of oil .

 

[KenJax Tree]

That was nice of him to give you 5 gallon bucket of oil .

Yeah considering it was $400

 

[junkman]

The bike I am on had an 89 motor in it. The secret to controlling a 500 is by learning to ride the bike a gear high. If you try to ride it like a 250 you just end up tiring your self out.
I don't find a cr500 to be hard to ride at all. It actually makes you a lazy rider, kinda of like a four stroke.

I cant remember, but didn't Steve Lampson ride a 500 in the des nations race ?

 

[stihl saws]

I cant remember, but didn't Steve Lampson ride a 500 in the des nations race ?

Are you talking the '93 race. That was Emig (125), Mcgrath (250), and Kiedrowski on the 500. One of my favorite races. We won by one point.

 

[stihl saws]

I wish they were still racing 500 GP bikes....they really sorted out the men from the boys. The new 4T 1000's are too nice to ride. I think a requirement to be a good 500 rider is to have no imagination of risk and believe your capable of dealing with anything thrown at you. Being a stubby or two short of a six pack probably helps.

Those were some bad ass bikes.

 

[bwalker]

The guy that does most of my motors(Eric Gorr) built CR-500 ' for GP racers Jorgen Nilsson and Leif Persson of Sweden, Rob Herring and Mark Eastwood of England, Jacky Vimond of France, and Peter Dirkx of Belgium.
My current bike has a cylinder done by Tom morgan, who was Jeff Wards engine builder/mechanic.
Gorr's CR-500 MX motors have epoxy in the transfers and lower compreaaion heads to tame the hit along with a higher exhaust port to help the bike rev above its stock power peak of 6500 rpm. I prefer a hard hitting bike that barks so I forgo the epoxy and try to replicate the 86 and 87 bikes.

 

[stihl saws]

I cant remember, but didn't Steve Lampson ride a 500 in the des nations race ?

I had to go back and look. Lamson, beat all the combined 125/500 class in the '96 Des Nations race in Spain. He did it on a CR125. Pretty amazing, but he was one of the best on a 125.