GT550A top end woes

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Alan H
Moto GP
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Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
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Re: GT550A top end woes

Post by Alan H »

If you both go, make sure fuel is available frequently for your mate. You should get about 40mpg or so driven 'normally'. I get less on the A as it's non standard and makes me feel much younger!! :roll: :lol:
Zero the odo when you brim the tank and note the mileage when you go onto reserve for future use - should be about 100 miles or so. There should be about a gallon reserve iirc.
Think of how stupid the average person is, then realise that half of them are more stupid than that.
vulcanman
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Suzuki 2-Strokes: GT550A 1976

Re: GT550A top end woes

Post by vulcanman »

Plenty of fuel stations around down here even on the smaller roads and routes we use. I havent measured mpg yet but will be .i dont think im getting 40 mpg though.ive washed all the baffles out .need to do another 200 odd miles and check head torque again.would have managed that if weather over last 2/3 weeks hadnt put a dampner on things .
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

My mates H2 triple went to the TT in 07 and i was on my GSXR1100.we planned fuel stops carefully but his H2 actually performed better than my 1100.i dont think my 550a is doing much more than mid 30,s mpg but will brim her see at the weekend.both bikes did well though although his drive chain snapped going into Kirk Michael.no damage to cases,phew but did muller the chain guard .i rode round to bike shop in Douglas but the chain was about 6 links too short as someone had put the wrong chain in the correct box.wish id counted them at time .got her recovered to my Uncles place in Foxdale and Padgetts said sorry and gave me correct one nxt day .i let you know how the 550 performs over the nxt few days .thanks for all of your help mate .
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Eve Alan ,my mate has got his H2 fired up and we hope to have bit of a 2 stroke day Sun at pub.
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vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Also another mate Honda Ray 🤣 has got his project NS250r on road today and joining us
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vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Eve Alan ,good run today .still feels as though on choke /part choke below 4k revs .then turbine smooth .gave her more revs once warm .took her up to near 6k and 80 mph .mate with a kettle suggests turning air screw in a quarter ?
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

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vulcanman
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Re: GT550A top end woes

Post by vulcanman »

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vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Couple of lovely strokers from todays turnout at 6 Bells Chiddingly East Sussex
dollydog
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Re: GT550A top end woes

Post by dollydog »

hi mate, just a quick word :up: if it feels like the choke is on or partly on below 4000 then it sounds like it's running slightly rich. if it is you want to turn the pilot airscrews OUT, not in. screwing them in will richen the mixture :D
cheers, dd.
p.s. don't go mad though, the last thing you want is a lean mixture.
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vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Many thanks Dollydog.thats what i meant .oops.she is running rich def .
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Afternoon all , brimmed tank last weekend and went on reserve at 99 miles.so near 33 to gallon.running well throughout rev range now .ta all
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Hi all ,torque checked head bolts this morn.350 mile into top end run in .2 only had a tiny fraction of movement .good news .weather gone a bit wet but will hope to get to 500 mark in nxt week
vulcanman
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Re: GT550A top end woes

Post by vulcanman »

Eve all 1425 miles done .running a treat but some difficulty getting her to fire on kicker.not catching fast on electric foot either.should i go onto super unleaded i wonder?
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Alan H
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Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
Location: The Republic of South Yorkshire

Re: GT550A top end woes

Post by Alan H »

Shouldn't need super. What plugs do you have in and how hard do you ride?
My 550s ALWAYS need a bit of choke when warm and full choke from cold. Plus, turn the tap to prime if the bike hasn't run for more than a couple of days then back to on/res when it starts. Electric start pumps it through fairly quick (3-4 seconds) but kickstart doesn't until your leg is fed up.
Think of how stupid the average person is, then realise that half of them are more stupid than that.
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