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Old 27-05-18, 12:29 PM   #21
Bibio
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Default Re: K1 starts but cuts out after a second or two.

take a long screwdriver and tap the float bowls with the handle end. this sometimes frees up the float valves.
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Old 27-05-18, 12:52 PM   #22
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Default Re: K1 starts but cuts out after a second or two.

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Originally Posted by ejohnh View Post
A mate of mine has what he calls a sonic cleaner. How do they work?
The part is placed in a liquid solvent bath, the bath is agitated at a high frequency which loosens the dirt. It's not a miracle cure, some jets still need poking out with a bristle/wire/drill. The link I included on a prior post shows the results that can be obtained but it may be cost prohibitive (unless your mate owes you!)

Last edited by Seeker; 27-05-18 at 03:18 PM. Reason: missed a word
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Old 04-06-18, 10:48 PM   #23
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Default Re: K1 starts but cuts out after a second or two.

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I tried Mechanic In a Bottle over the course of 4 days, trying to start the engine every couple of hours or so. I was hoping that with the mixture travelling through the carbs, the gunk or whatever would dissolve. Unfortunately that didn't happen so I'll send of for a couple of carb rebuild kits etc,, Thanks for all your advice guys, I'll let you know how I get on.
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Old 05-06-18, 01:24 PM   #24
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Default Re: K1 starts but cuts out after a second or two.

I haven't watched his videos but this guy either gives a comprehensive sv carb cleaning procedure or likes to talk:

https://www.youtube.com/watch?v=do7B2T-kNkU (there are 6 videos)
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Old 05-06-18, 02:48 PM   #25
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Default Re: K1 starts but cuts out after a second or two.

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I haven't watched his videos but this guy either gives a comprehensive sv carb cleaning procedure or likes to talk:

https://www.youtube.com/watch?v=do7B2T-kNkU (there are 6 videos)
Just been watching the vids. What a great idea. Thanks..
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Old 05-06-18, 03:31 PM   #26
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Default Re: K1 starts but cuts out after a second or two.

A few suggestions:
1) do 1 carb at a time so you have a reference, take pictures (you won't remember where the widget fits)
2) do it in clean area, ideally on a large table so when bits drop out of the carbs and roll, you'll find them.
3) an air line of some type is useful, if not essential
4) carb jets are brass, poking them roughly with a metal object can change their sizes which will introduce more problems. Some of the holes on the smaller jets are the size of smallish needles.
5) soaking the carbs overnight may help - you'll need carb cleaner, obviously.
6) some of the parts are surprisingly fragile (floats for example). Float heights are adjustable by bending (!) a tab, rough handling can also adjust them - you don't want that.
7) take your time and enjoy the learning experience, your next bike will probably be fuel injected so you'll be able to learn a whole new set of skills

(worst case - there are usually sets of carbs on ebay!)
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Old 05-06-18, 04:25 PM   #27
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Default Re: K1 starts but cuts out after a second or two.

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Originally Posted by Seeker View Post
A few suggestions:
1) do 1 carb at a time so you have a reference, take pictures (you won't remember where the widget fits)
2) do it in clean area, ideally on a large table so when bits drop out of the carbs and roll, you'll find them.
3) an air line of some type is useful, if not essential
4) carb jets are brass, poking them roughly with a metal object can change their sizes which will introduce more problems. Some of the holes on the smaller jets are the size of smallish needles.
5) soaking the carbs overnight may help - you'll need carb cleaner, obviously.
6) some of the parts are surprisingly fragile (floats for example). Float heights are adjustable by bending (!) a tab, rough handling can also adjust them - you don't want that.
7) take your time and enjoy the learning experience, your next bike will probably be fuel injected so you'll be able to learn a whole new set of skills

(worst case - there are usually sets of carbs on ebay!)
I stripped engines and carbs back when I was young. My first bike was a 350 Matchless trials oil leaker in 1958. I had that apart in the flat where I lived with my family in London. My mum used to go bananas at me. Can't blame her, looking back Those were the days of the Norton Dominator 88. Tiger 110, Ariel square 4 and many others .

THis SV is the one I bought when I went back into biking in 2006. I couldn't believe how much bikes had improved since I got rid of my AJS CSR sport twin when my first child was born in 1962. Since I bought the SV I have had a couple of others , inc a Yam FZ1, but I hung onto the SV because it was simple the most reliable. She took me all over Ireland, France and Spain over the years. It will be my last proper bike. I am thinking of getting a Yam XMAS 300 for running around. My bike touring days are probably done though. Sad thoughts eh?

Last edited by ejohnh; 05-06-18 at 04:26 PM.
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Old 05-06-18, 07:02 PM   #28
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Default Re: K1 starts but cuts out after a second or two.

I didn't mean to teach my grandmother to suck eggs, sorry. You'll have fun, I'm sure.

... at my local bike haunt I know a young man in his 80s that has attached a sidecar to his Vincent, added an electric start and rides it in the summer, in the winter he rides his Kawasaki outfit ...

Last edited by Seeker; 05-06-18 at 07:04 PM.
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Old 06-06-18, 11:01 AM   #29
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Default Re: K1 starts but cuts out after a second or two.

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I didn't mean to teach my grandmother to suck eggs, sorry. You'll have fun, I'm sure.

... at my local bike haunt I know a young man in his 80s that has attached a sidecar to his Vincent, added an electric start and rides it in the summer, in the winter he rides his Kawasaki outfit ...
Haha! First snag:

released cylinder head clamp securing rear carb but bolt head on front carb clamp is rusted too much for screwdriver to get a purchase. Any ideas on how to remove the front carb despite this? Not sure how easy it will be to saw through the clamp.
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Old 06-06-18, 11:11 AM   #30
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Default Re: K1 starts but cuts out after a second or two.

I haven't removed SV carbs in 17 years so my memory of access to the area is like your screws, a little rusty. Do you have a Dremel? Could you either cut a screwdriver slot in the head or drill the head off the screw completely (a left handed drill bit would be best).
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