rev no rev

General discussion about Street two-stroke Suzuki motorcycles.

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billy192
Around the block
Posts: 71
Joined: Thu Jan 09, 2014 2:05 pm
Country: UK
Suzuki 2-Strokes: T500 M. Honda CB750K6,CB500T76, Yamaha Vmax
Location: Gloucester UK
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rev no rev

Post by billy192 »

Hi Just did a maiden ride before the MOT tomorrow and the tachometer works great then when I put it into gear it drops to zero. put back in first an boom works again.
strange
Billy
Suzuki T500 1975
Suzuki GT750 1974
CB 250G5 1975
CB 500T 1976
CB750 K6 1976
Kawasaki S3 1974
C90 1972
Triumph Tina 1964
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tz375
Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Location: Illinois

Re: rev no rev

Post by tz375 »

Isn't it driven off the clutch on that bike so if the clutch is pulled in - no tacho and no oil pump. Better check that with someone who knows those bikes better than I do.
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ConnerVT
Novice racer
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Joined: Wed Jan 18, 2012 8:01 pm
Country: USA
Suzuki 2-Strokes: T500R (now), T500M (40 yrs ago)
Location: North of Albany, NY

Re: rev no rev

Post by ConnerVT »

For the T/GT500, you are correct. Also, the oil pump is driven in the same manner, so long periods of idle with the clutch pulled should be avoided.

(A good general riding tip, anyway. You should put the bike in neutral when sitting at a (long) stoplight. If the clutch cable breaks while in gear, you could lurch out into traffic.)
billy192
Around the block
Posts: 71
Joined: Thu Jan 09, 2014 2:05 pm
Country: UK
Suzuki 2-Strokes: T500 M. Honda CB750K6,CB500T76, Yamaha Vmax
Location: Gloucester UK
Contact:

Re: rev no rev

Post by billy192 »

o, great. so all T500 and GTs do it then. another thing is when I was about to put the bike in the garage the revs just jumped up to 4-5K so I turned the ignition off still screaming, hit the kill, still screaming and got a wooden brush and pulled the plug leads ,,,,,,still screaming. how can a 2 stroke fire with no power?

billy
Suzuki T500 1975
Suzuki GT750 1974
CB 250G5 1975
CB 500T 1976
CB750 K6 1976
Kawasaki S3 1974
C90 1972
Triumph Tina 1964
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Jimroid
To the on ramp
Posts: 309
Joined: Sun Feb 21, 2016 8:32 pm
Country: USA
Suzuki 2-Strokes: GT500 T500 GT750
Location: Pisgah Forest, N.C. USA

Re: rev no rev

Post by Jimroid »

It was dieseling. A slide sticking open a bit, or air leak, etc. can cause it.
Mencie
On the street
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Joined: Wed Mar 16, 2016 6:08 am
Country: U.K.
Suzuki 2-Strokes: T500-2

Re: rev no rev

Post by Mencie »

If it's a Gt not a T, as in a later one with the electronic ignition, check the earth from the CDI unit hasn't come loose or isn't damaged.

I had the similar with my old GT after a rebuild, and had to whip the plug caps off to stop it, traced it back to that wire which needs to be well connected.
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