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Old 10-26-2011, 10:46 AM   #31
GAS GUY
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Quote:
Originally Posted by mcma111 View Post
No. What part of the bike moving to get cooled did you miss??
It doesn't sound like the engine has high temp problems while moving, if it is running 250 degrees or less.
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Old 10-26-2011, 10:50 AM   #32
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Quote:
Originally Posted by Wattner View Post
I would have to say in traffic sitting still that the fins don't do too much. On the new bike, I was steadily showing 146 degrees while moving at all... Once I stopped in traffic for 30 minutes or so, the temps went up to 303.... I was having problems with the battery, so I could not shut the bike off and saw the temps getting on up there. Once I rolled even 10' the temps started dropping fast. After we got roiling again at speed, it took maybe 5 minutes to get back down to 150 or so. The outside temps were in the upper 70's FYI

I think the fins do great once there is any wind at all on them.
If I am not mistaken, oil doesn't even burn off condensation til 180 plus degrees, so we don't want oil temps too low.
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Old 10-26-2011, 10:53 AM   #33
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Originally Posted by imjinscout View Post
If I am not mistaken, oil doesn't even burn off condensation til 180 plus degrees, so we don't want oil temps too low.
Wick the throttle and cruise at 80mph down the freeway for extended periods of time and mikes bike will run around 190 to 200, he's talking about slower speed riding.
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Old 10-26-2011, 12:28 PM   #34
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Originally Posted by imjinscout View Post
It doesn't sound like the engine has high temp problems while moving, if it is running 250 degrees or less.

The stock XR has temp problems while running 65 mph or more, it will get hot on you, and it has problems 30mph and lower.
Run your bike at extended speed for 20 miles or more in hot weather and let us know how warm it gets.

The worse thing you can do to an XR is let it idle or let it sit in traffic, the engine below 2000 rpm will not get enough oil flow and air flow, the other worse thing is to run the roads at high speeds...

Keep your bike in the happy rpm range 2000 and up...
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Old 10-26-2011, 12:38 PM   #35
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Quote:
Originally Posted by cyclewizard View Post
The stock XR has temp problems while running 65 mph or more, it will get hot on you, and it has problems 30mph and lower.
Run your bike at extended speed for 20 miles or more in hot weather and let us know how warm it gets.

The worse thing you can do to an XR is let it idle or let it sit in traffic, the engine below 2000 rpm will not get enough oil flow and air flow, the other worse thing is to run the roads at high speeds...

Keep your bike in the happy rpm range 2000 and up...
We got lost the first day in Colorado 180 miles from the house at 4:30 pm and was pretty much forced to ride Interstate 70 all the way back. My bike had about 300 miles on it at that point. Thank goodness it was cool outside because I bucked up and rode that dude 65-75mph all the way back and just tried not to think about it.
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Old 10-26-2011, 01:03 PM   #36
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Quote:
Originally Posted by cyclewizard View Post
The stock XR has temp problems while running 65 mph or more, it will get hot on you, and it has problems 30mph and lower.
Run your bike at extended speed for 20 miles or more in hot weather and let us know how warm it gets.

The worse thing you can do to an XR is let it idle or let it sit in traffic, the engine below 2000 rpm will not get enough oil flow and air flow, the other worse thing is to run the roads at high speeds...

Keep your bike in the happy rpm range 2000 and up...
Thats the info I was looking for, thanks !!
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Old 10-26-2011, 04:10 PM   #37
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I like the engineering aspect of this idea, but wouldn't simply adding an oil cooler be much easier to do?
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Old 10-26-2011, 04:17 PM   #38
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Cycle Wizard,

I had already planned on going with the big fin head when I send you my next engine for the upgrade/mod so yes I am very interested.

I hope to have the parts you have now back together in running by years end so with any luck I will have the next engine ready to send to you March/April time frame.

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Old 10-26-2011, 04:46 PM   #39
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I like the big finned head, but the one stop shopping deal is what I'd want. I know there's plenty of room for big fins with a 5.8 tank, not so sure on the tall valve caps. Roller rockers!
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Old 10-26-2011, 05:36 PM   #40
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I would definately be interested in a big fin head and cylinder kit and would be happy to buy just the kit and get it installed myself as im in Australia.
Easier for you to send me a kit than me send my top end and then send it back.

Graeme
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Old 10-26-2011, 05:43 PM   #41
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I don't have an air cooled XR, but if I did I'd be all over this.
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Old 10-26-2011, 05:49 PM   #42
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CW...are the finned valve caps just for roller rockers or can they work on a stock bike? fitment issues?

Im down for them right now

thanks
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Old 10-27-2011, 02:54 AM   #43
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Quote:
Originally Posted by elsalvadorklr View Post
CW...are the finned valve caps just for roller rockers or can they work on a stock bike? fitment issues?

Im down for them right now

thanks
They will work either way, with or with out the roller rockers.
We used them back in the 80's on our flat track RS600's with reduced base circle 480 lift cams to clear the caps.
At 450 to 480 inch lift the intake valves will hit each other with the canted valve head so there's some tricks you have to do to avoid that.
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Old 10-27-2011, 02:54 AM   #44
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I would definately be interested in a big fin head and cylinder kit and would be happy to buy just the kit and get it installed myself as im in Australia.
Easier for you to send me a kit than me send my top end and then send it back.

Graeme
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Old 10-27-2011, 02:56 AM   #45
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Originally Posted by katbeanz View Post
I like the big finned head, but the one stop shopping deal is what I'd want. I know there's plenty of room for big fins with a 5.8 tank, not so sure on the tall valve caps. Roller rockers!
Hmm, is the 5.8 that close to the rocker box????
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