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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| BMW Tech BMW Tech Forum - For Questions specific and of interest to BMW riders only. Questions comparing which bike is best etc go in the "Which Bike" forum. |
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#1
1 Jul 2009
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Piston crown / valve cleaning
As I have currently got the heads off my R80 Basic i thought i would clean up the valves and piston crown.Anybody know if there is a suitable product to help with this (apart from elbow grease ! 0 cheers
mark 
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#2
1 Jul 2009
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Clean surfaces with solvent/thinner and dishwasher powder.
To smoothen the piston head I use a Dremel and its accessories. To clean the valves - I use a rotating steel-brush on my stationary drill. (Sorry I do not know the correct English words for these tools). Install valvestem caps when you reinstall the heads on the bike. The caps are VW racing parts; dalhems world wide mail order, race parts, personal safety equipment,VW,mini cooper,electronics, bilstyling , Welcome to GeneBerg.com It is a really small cost. I've been using caps for the last 50 000km or so. Easier to adjust the play. More stabile play. Better lubrication; 2 vs 1 surfaces. Saves the valvestem butts and the rockerarm. http://62.181.75.60:80/Default.aspx?...9-9c03b2f88e41 You should aim at smoothing all edges to be as lean/smooth "as a babys bottom". There is a 42mm highflow valve that you could install instead of the Y-shaped original BMW/TRW valve: Bugpack 42x112x8; it needs to be shortened and new collet groves made. Untitled Page http://62.181.75.60:80/Default.aspx?...3-c8847365bd63 http://62.181.75.60/Default.aspx Art.no.: 4045-031 Price: 235,00 Sek (=½ price compared with BMW/TRW) The highflow, T-shape, enhances the volumetric degree, and makes the low-revs stronger by about 1 gearshift at 2000rpm. Check the guides - they may need to be renewed... Check the piston rodbearings. Check the stubs - they have a tendency to get loose causing airleakage. New pistonrings perhaps? New cylinderbase O-rings and pushrod tube rubber seals. New headgasket.
__________________
Drive Safely, Albert
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