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Engine bench start. Help needed.

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 Topic moved: from General Bike Chat to The Workshop by stinkwheel (17 Jan 2017 - 19:45)
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William013
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Joined: 17 Jan 2017
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PostPosted: 19:39 - 17 Jan 2017    Post subject: Engine bench start. Help needed. Reply with quote
Hey guys, first post on this site. Iv been viewing it a long time tho. Anyways im in the need of some serious help... i have just rebuilt a suzuki gp 100 engine and i would like to see if it runs( out of frame) before i go putting any more money into it. Its been a long procces, an hour here an hour there, you know the story. Any way im hoping that the welth of knowlage in here might be able to explain in fine detail how im suppose to do it. The wiring that is....Complete newb at rebuilds by the way.
Thanks in advance.
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William013
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PostPosted: 20:03 - 17 Jan 2017    Post subject: Reply with quote
Didnt realize i was offending anyone. Its just a simple question
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Tamsin
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PostPosted: 20:04 - 17 Jan 2017    Post subject: Reply with quote
Aloysius Parker wrote:
If you have been viewing the forum a long time then you should know it is frowned upon to post in the wrong section.


and you should know that everyone thinks you are an obnoxious wankstain.

William, ignore him...
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Pete.
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PostPosted: 20:14 - 17 Jan 2017    Post subject: Reply with quote
William013 wrote:
Didnt realize i was offending anyone. Its just a simple question


You're not it's just that he's a naturally ornery individual.

Not much do go wrong with the GP engine, but if you're going to test it why not hang it in the frame - it's only a couple of bolts stuffed through the mounts.

Other than that I do believe the GP coil runs directly off the stator, so all you need is to bolt the coil to the engine and run the one wire to the stator, stick the spark plug cap on the plug and you're done.

Squirt fuel in the intake and kick it over, should start and run for a few seconds even without a carb.
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pepperami
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PostPosted: 20:18 - 17 Jan 2017    Post subject: Re: Engine bench start. Help needed. Reply with quote
William013 wrote:
.. i have just rebuilt a suzuki gp 100 engine and i would like to see if it runs.


Why not just temporally put it back in the frame .
slotting on the carb, coil, and exhaust on is quiet easy on a GP 100.
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William013
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PostPosted: 21:36 - 17 Jan 2017    Post subject: Reply with quote
Nice on guys. As for slotting it in the frame well thats a no go. Everything is stripped. The bike needs a lot of new parts, tank included. It was lying up for 20 odd years so basically its a total resto. The picture is what it was like when i first got it.
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Hong Kong Phooey
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PostPosted: 21:46 - 17 Jan 2017    Post subject: Reply with quote
William013 wrote:
Nice on guys. As for slotting it in the frame well thats a no go. Everything is stripped. The bike needs a lot of new parts, tank included. It was lying up for 20 odd years so basically its a total resto. The picture is what it was like when i first got it.


20 years? I'd be turning it over by hand first. Preferably after oiling the bore.
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William013
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PostPosted: 21:54 - 17 Jan 2017    Post subject: Reply with quote
Hong Kong Phooey wrote:
William013 wrote:
Nice on guys. As for slotting it in the frame well thats a no go. Everything is stripped. The bike needs a lot of new parts, tank included. It was lying up for 20 odd years so basically its a total resto. The picture is what it was like when i first got it.


20 years? I'd be turning it over by hand first. Preferably after oiling the bore.


Suprisingly enough, the inside of the engine was imacculate. No rust at all. Compression was excellet as was gearbox, carb and clutch. I just decided if im going to go to the hassle of a complete resto i might aswell rebuild the engine.
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skatefreak
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PostPosted: 11:31 - 18 Jan 2017    Post subject: Reply with quote
A rolling chassis is still a much quicker and easier place to put the engine to run it than building a jig from scratch to hold it...
No fuel tank... Upside down coke bottle etc etc...
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chris-red
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PostPosted: 12:03 - 18 Jan 2017    Post subject: Reply with quote
Do it in the frame, cheaper, easier, quicker and better than building a jig for it to sit in.
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William013
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PostPosted: 19:52 - 19 Jan 2017    Post subject: Reply with quote
Yeh it makes more sense to bolt it back in the frame to start it. Unfortunatly tho i have just descovered that the ignition coil is knackerd so it will be next week before it arrives. Thanks to all for the help and suggestions. I will let ye know how i get on when the coil arrives.
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William013
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PostPosted: 22:54 - 29 Jan 2017    Post subject: Reply with quote
Hey guys, so after getting a new ignition coil and spark plug i set up the engine to see if it will start and no go. Its firing and acting like its just about to run but just wont. Spent about an hour and a half trying but still no luck. Has anyone any suggestions plz
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Hong Kong Phooey
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PostPosted: 11:46 - 30 Jan 2017    Post subject: Reply with quote
William013 wrote:
Hey guys, so after getting a new ignition coil and spark plug i set up the engine to see if it will start and no go. Its firing and acting like its just about to run but just wont. Spent about an hour and a half trying but still no luck. Has anyone any suggestions plz


If compression still ok, check fuel gets to carb, eliminate air leaks.
You could try easy start or equivalent. If it runs on that when squirted into the intake is safe to say fueling issue.

This is presuming the timing was set properly before you did anything.
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