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POWERVALVES NOT MOVING


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FASTFILL

 
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Joined: 07 Sep 2009

Location: BRIGHTON UK
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POWERVALVES NOT MOVING

Tue Sep 08, 2009 11:14 am » Post: #1 » Download Post

HI TO YOU ALL!!
HAVE JUST BOUGHT AN MC 18 EARLY MODEL LAST WEEK!

i HAVE TRIED TO SEARCH AROUND FOR AN ANSWER TO THIS AND CANT FIND ANYTHING SO i HOPE SOMEONE WITH KNOWLEDGE OF NSR S CAN HELP?

WHEN THE IGNITION IS TURNED ON ARE THE VALVES MEANT TO DO A STROKE ?
ALSO WHAT ARE THE SETTINGS TO ALIGN THEM?

ALSO HOW OFTON DO PISTONS/RINGS NEED REPLACING OR BARRELL RE PLATING? WHERE TO GO TO GET PISTONS IN UK?

i AIM TO KEEP BIKE FOR A LONG TIME AS ITS FANTASTIC SO WANT TO START REFRESHING IT!
ANY HELP APPRECIATED
CHEERS


Very Happy
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2Smoke

 
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1987 Honda NSR250 MC16
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Tue Sep 08, 2009 11:21 am » Post: #2 » Download Post


Valves dont cycle when the ignition is turned on!

Go to Tyga for pistons, either www.jap4performance.co.uk or www.tyga-performance.com Cool
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Dave Ett
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Tue Sep 08, 2009 1:31 pm » Post: #3 » Download Post

2Smoke wrote:
Valves dont cycle when the ignition is turned on!


Kinda.

If the engine was at tickover when it was turned off, the valves probably won't move. If it was at higher revs though, the valves may have come to rest in the open position, in which case they will drive to closed when you switch it on.

You can manually set the valves to hi with the ignition switched off, then turn it on and see if they drive. (Don't forget the kill switch)

If the motor sounds strained, turn the bike off and find out why - the quickest way to destroy your ignition unit is the power valve motor drawing too much current when the valves are siezed up - wither with carbon, or because the cables are dry / too tight / shagged.
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2Smoke

 
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1987 Honda NSR250 MC16
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Tue Sep 08, 2009 4:55 pm » Post: #4 » Download Post

Ok Dave of course, I was assuming he was thinking of the RD's YPVS cleaning cycle!
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