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26 Nov 2004
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Registered Users
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Join Date: Nov 2004
Location: Mainly Slovenia
Posts: 371
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Correct Tappet clearance for R 80 G/S engine
Hi from cold and rainy Italy..
I set the tappet clearance on my newly bought bike this morning, and I notice a low valve ticking noise that wasn't there before...
Mind you the valves were quite shut before doing this so it could be just me not really used to the sound that the engine should be making.
In any case my question is: what is the correct tappet clearance for this bike, everyone seems to say 0.10mm for the intake but for the exhaust I can't figure out if it should be 0.15mm or 0.20mm
The bike has done about 70,000km and the last owner claims to have changed the cam chain recently.
Thanks for any advice!
A.
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26 Nov 2004
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HU Founder
Veteran HUBBer
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Join Date: Dec 1997
Location: BC Canada
Posts: 7,324
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.10 and .15 is correct for the R 80G/S engine. I've always run that in mine and it works fine.
.10 and .20 is for the R100.
Note that you want to also check the rocker end clearance, it should be .05 + or - .02mm clearance.
See this thread for more: http://www.horizonsunlimited.com/ubb...ML/000291.html
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Grant Johnson
Seek, and ye shall find.
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One world, Two wheels.
www.HorizonsUnlimited.com
__________________
Grant Johnson
Seek, and ye shall find.
------------------------
Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
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27 Nov 2004
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Registered Users
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Join Date: Nov 2004
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Thanks for your reply...! I reset the exhaust tappets to 0.15 and the sound is much better!
I just wanted to ask you one more thing. I've been using the bike for nearly a month now, and I'm not too happy with the fuel consumption I'm getting about 14-16 km/l (sorry I've no idea how to convert to MPG) As I mentioned already, the tappets were shut tight, could this also have been affecting fuel consumption? Any hints on how to improve things a little?
Thanks again !
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27 Nov 2004
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HU Founder
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Join Date: Dec 1997
Location: BC Canada
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That sounds about right for fuel consumption, depending of course on in town vs highway etc.
It's an OLD engine design, and is not especially good for fuel mileage. The new F650's for instance gets MUCH better fuel mileage, can be as much as 50% better.
DO replace the slide needles and jets, they wear and increase fuel usage significantly. Also make sure the float level is correct - floats should be dead level.
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Grant Johnson
Seek, and ye shall find.
------------------------
One world, Two wheels.
www.HorizonsUnlimited.com
__________________
Grant Johnson
Seek, and ye shall find.
------------------------
Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
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Check the RAW segments; Grant, your HU host is on every month!
Episodes below to listen to while you, err, pretend to do something or other...
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