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Author Topic: Dirtbag Oil-Boiler  (Read 2580 times)

Offline doc_rot

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Dirtbag Oil-Boiler
« on: Dec 12, 2017, 18:00:16 »
I moved a couple months ago and am no longer commuting 100 miles everyday so I can have a daily rider that has shorter service intervals. I've been wanting something vintage and cool, but not too nice so that I worry about it. Enter this '86 GSXR 750 i picked up for cheap recently. My plan right now is to get it on the road, ride it, and not do anything too crazy. I'm going to attempt to do my own "dirtbag challenge" and build this thing for less than $1000 including the purchase price. I think its doable because this project is pretty complete (came with a box of parts), I have a ton of parts just laying around collecting dust, and I have a friend who used to race these bikes who has a garage full of parts that he will let go for cheap.

The history of this bike that was related to me from the seller is this; his father bought this bike new, hopped it up, rode it a ton, and then sold it in the late nineties. Earlier this year he saw a guy driving this bike around and realized it was his dad's old bike so he chased him down and bought the bike off the guy. He didn't have the time or money to fix it up so he passed it on to me. Obviously his dad loved it because there are lots of cool parts on it but whoever owned it after him did a real number on it.

First thing to tackle is the wiring; its a total rat nest. The PO already started stripping it out to fix it. I found a PDF of the service manual, and am trying to determine what parts are missing from electrical system. For a second I thought these bikes didn't have a regulator, but after scrutinizing the diagram it appears its in the alternator. Very strange. I'm going to wire it first just to run to see if this turd is worth building, if it cooperates and runs then I'll do a proper harness. Heres some pics.
« Last Edit: Dec 13, 2017, 03:16:36 by doc_rot »

Online irk miller

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Re: Dirbag Oil-Boiler
« Reply #1 on: Dec 12, 2017, 18:28:44 »
Those forks are so fun.

Offline doc_rot

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Re: Dirtbag Oil-Boiler
« Reply #2 on: Dec 13, 2017, 03:19:42 »
I can't decide if I should keep the 16" front Dymag, or use a set of Bandit 1200 wheels, rotors and 6 pot calipers my buddy offered up

Offline WhyNot

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Re: Dirtbag Oil-Boiler
« Reply #3 on: Dec 13, 2017, 06:38:31 »
Cool, I gotta watch.
2006 Harley Davidson Heritage Softail
1975 Honda CB750K5 needs carb work
1974 Honda CB350F2 needs tins painted (being lazy)
1972 Honda CB175K2 roller no engine
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Offline 1fasgsxr

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Re: Dirtbag Oil-Boiler
« Reply #4 on: Dec 13, 2017, 10:26:01 »
I am so watching this one !!
http://www.dotheton.com/forum/index.php?topic=41083.0

Life is a journey from the maternity ward to the crematorium....

Offline Popeye SXM

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Re: Dirtbag Oil-Boiler
« Reply #5 on: Dec 13, 2017, 10:37:22 »
Great bikes the gsxr 750 even by todays standards. Me I'd go with 6 pot brakes, I find they give more ''feel'', always a good thing on a commuter. I hope this one doesn't give too much trouble

Online Maritime

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Re: Dirtbag Oil-Boiler
« Reply #6 on: Dec 13, 2017, 10:47:05 »
Sign me up. looks like fun
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Offline The Limey

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Re: Dirtbag Oil-Boiler
« Reply #7 on: Dec 13, 2017, 17:00:55 »
Ooh, a Flexi Flier.  I've always had a soft spot for those old slabsides.  Good old fashioned hairy chested machines.  Watching with interest.
I was born a rocker.  I'll die a rocker.  And I'm proud of it.

Offline doc_rot

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Re: Dirtbag Oil-Boiler
« Reply #8 on: Dec 24, 2017, 06:34:17 »
I hacked  the wiring and it fired up with a squirt of starting fluid. I then pulled the carbs and suspecting they were super dirty, took  them apart. Turns out they are RS36 flat slides. Nice upgrade for a hot motor. Also it appears the slide pivot shaft is held on with spring pins. What is the best way to remove  these without doing damage?  I really want to do a deep clean on  these carbs because they are so dirty.
« Last Edit: Dec 24, 2017, 06:49:37 by doc_rot »

Offline jpmobius

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Re: Dirtbag Oil-Boiler
« Reply #9 on: Dec 24, 2017, 11:07:45 »
I just drive them out with a pin punch, but you do have to be careful.  It's very important to back up behind the pin properly.  Sometimes I will make a back up plate with a finger or arm that fits up into where the pin is out of a piece of steel angle or plate that I can clamp securely in a bench vise.  Drilling a hole in it for the pin to pass through will provide good support so you don't damage anything.  Getting someone to hold the rack accurately on the back up while you tap out the pin(s) helps a lot.
Mobius


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