Grant demystifies the black art of Tire Changing and Repair to help you STAY on the road! "Very informative and practical." See the trailer 
Cotton or synth sweat-wicking t-shirts with the Horizons Unlimited logo on the front and a snappy slogan (changing every year) on the back.
Show your route on your panniers. Great conversation starter when you meet people on the road!
Motorcycle and travel books to inspire and inform you!
ll 5 DVDs with a custom printed slip case. "The series is 'free' because the tips and advice will save much more than you spend on buying the DVD's."
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| Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions. |
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#1
23 Aug 2005
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which spark plug?
I went to buy a spare plug for my 1VJ today, and the microfiche listed a DPR7EA-9. When I had a 55W, I always ran it on a DPR8EA-9, which to my understanding is cooler running. Why does the 1VJ need a plug to make it run hotter. Surely a bike which was known for overheating problems could do with running cooler. Or am I missing the point? Which plug do you guys use or reccommend?
Cheers Dave 
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#2
23 Aug 2005
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This old post has some useful information in it:
http://www.horizonsunlimited.com/ubb...ML/000400.html
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#3
23 Aug 2005
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Thanks Geoff
That was helpful. Have you or anyone else tried the iridium plugs, and noticed a difference, or are they a waste of money for these bikes? Dave
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#4
23 Aug 2005
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Hi,
I have used them, but not with the XT. My gut feel is that they keep a consistant performance over a long time and really benefit a tuned bike (high compression pistons; high lift cams; etc...). Their cost makes them perhaps an expensive luxury and unneeded for the XTs level of tune - I'm sure somebody will have a different view though. I think I will stay with the standard plugs. Ciao, Geoff
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