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    scouseviking is offline Senior Member
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    Oil cooler

    This time last year I asked about fitting an oil cooler on my Dommie but got side tracked as I was having clutch and flatside issues and lack of funds to finance an oil cooler.
    Anyhoo ,the clutch was replaced and now works as it should and my flatside is dialled in now with the help of our resident scrambling flatside guru from brummingham.
    I managed to stash some cash over the winter and now my Dommie is ready to have me thrash the bejeezuz out of it I thought it might be a good idea to hook up an oil cooler...
    I dont want to get one stateside as the VAT and import duty will make it un-affordable...
    Any suggestions about fitting an oil cooler and where to source the parts from?
    Are there any craftsmen left in blighty that can fabricate this kinda thing or do I have to spend my money elswhere?
    Last edited by scouseviking; 01-05-17 at 09:22 PM.

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    whoisdc's Avatar
    whoisdc is offline call me Dave
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    Re: Oil cooler

    I have two dommies with oil coolers on them .
    i plumb them in for the summer then replum in the winter .This takes about 10 minutes tops as all i do is replace the rubber oil feed connections.
    The first is a wrap round headstock type, if you look on the thumper forum you can see the link ,i will post some pics later of mine.
    The second is from a Toyotoa car positioned on the frame down tube in full air flow position.
    they work well . Ihave seen lots of different types of oil coolers ,the ones from the states(and germany ) are all very chic and fit where the toolbox sits. remember to fully charge the oil feed pipes and the cooler prior to starting the machine.
    I have had no issues with this cheap modhttp://s1043.photobucket.com/user/whoisdc20/libraryhttp://s1043.photobucket.com/user/whoisdc20/library//http://s1043.photobucket.com/user/whoisdc20/library/
    Last edited by whoisdc; 02-05-17 at 05:02 PM.

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    nick in brum is offline Senior Member
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    Re: Oil cooler

    Do you really think you need one ?
    The reading on my temp dipstick rarely gets above 100 and this is with a high compression big bore piston which creates more heat than a stock set up, the red zone on the thermometer is 120,
    The dipstick reading is the hot oil returning to the oil tank, once its passed through the frame down tube it will have cooled a few degrees
    xjr1300,gs1000,nx650 scrambler,triumph 500,dr350,

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    scouseviking is offline Senior Member
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    Re: Oil cooler

    Quote Originally Posted by nick in brum View Post
    Do you really think you need one ?
    The reading on my temp dipstick rarely gets above 100 and this is with a high compression big bore piston which creates more heat than a stock set up, the red zone on the thermometer is 120,
    The dipstick reading is the hot oil returning to the oil tank, once its passed through the frame down tube it will have cooled a few degrees
    I think before I splash out ,I should get one of those thermometer dipsticks and see how it the temp goes.
    My vaportec fidgital speedo has a temp sensor which I fitted to the head but its got so many flashing lights and numbers I dont bother with it..
    Are those temp dipsticks accurate and are the ones on ebay any good?

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    Bounder is offline Senior Member
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    Re: Oil cooler

    The dipstick thermometers are good but the RR ones made in Germany are better than the cheap knockoffs, I have heard that the plastic clouds over after a while with the cheap ones.
    Louis sell the RR ones for 65
    https://www.louis.ie/artikel/rr-oil-...list=277932365

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    nick in brum is offline Senior Member
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    Re: Oil cooler

    Quote Originally Posted by scouseviking View Post
    Are those temp dipsticks accurate and are the ones on ebay any good?
    Hard to say how accurate they are, dont know how i could test it, but it is a good indicator , if it usually runs at 90-100 degrees and then starts reading 120 you know somethings not right,
    i got mine off ebay made by JMP , so far so good about 18 months, its only a thermometer a fairly simple device not much to go wrong with it i wouldn't think
    xjr1300,gs1000,nx650 scrambler,triumph 500,dr350,

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    Re: Oil cooler

    Mine came with the bike, looks good and no troubles so far. Usually runs near 100C once properly hot.

    I'm guessing a good way to test it would be to make a cup of tea - once the kettle boils drop the oil gauge in and it should read pretty close to 100 degrees!

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    scouseviking is offline Senior Member
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    Re: Oil cooler

    Quote Originally Posted by lepews View Post

    I'm guessing a good way to test it would be to make a cup of tea
    How does the tea taste once you dipped your stick in it?

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    Re: Oil cooler

    Their not too far out mine reads about 5 deg C too high its the cheap one and been on the bike for about 4 years no issues and still using the original O ring, As for the oil cooler here in the UK i dont think theres any need for one i had fitted the one off XR400 a few years ago but had to remove it to fit the big tank as the hot oil pipes were touching the plastic tank. can't say i noticed any difference in the running temperature afterwards. I have noticed it runs a bit cooler after changing the carb and having it set up properly

    That's just under 80 Deg C on the dipstick

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    Re: Oil cooler

    Got them on all mine. Check the accuracy in a pan of boiling water, I checked one and it pretty good - within 3 or 4 degrees.
    In my experience the hottest temperatures are seen on the motorway, off-road usually cools them down a little bit.
    Normal running in 15C ambient is ~ 95 or 100C
    In summer on a hot day I can see 115C, if it goes above I throttle back and let it cool down.
    I can see how a Dommie with it's higher power O/P could cook itself if ridden hard for long periods in a hot climate.
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