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Old March 18th, 2018, 08:16 PM   #1
TrickyTriggs
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Name: Tommy
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Motorcycle(s): 1995 RF900R, 1996 GS500E

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Getting my RF900R to run

Hi guys, I'm back again and I am in desperate help!

I have a 1995 Suzuki RF900RS, it has over 40k miles on it. Bought from some guy who didn't take any good care of it. I have rebuilt a bike before but it was a two cylinder (GSTWIN) and I figured an engine with two more couldn't be that harder. I rebuilt the top end and did a valve clearance check. Making sure to keep the exhaust clearances between .20 and .10mm. And the intake between .10mm and .20 mm.

Procedure for cam timing:
-- Rotated the crankshaft to top dead center
-- aligned the 1st marker on the exhaust cam shaft, level with the valve head, counted 13 pins to the left along the cam chain and aligned the 3rd marker on the intake cam.
-- Installed the cam tensioner.


Here the issue...

-- Carbs should have worked fine, they worked before I took the bike apart and after they should have kept working because I didn't do much to them at all.
-- When I start turn the fuel petcock on, fuel starts flowing. Take a good couple of minutes for the bike exhaust to make any kind of noise.
-- Bike immediately shoots of a loud gunfire(POP).
-- It will sometimes make a poomp, poomp, poomp, POP, poomp, poomp, poomp,, POP. And it will continue to do this unless I turn the bike off.
It also cause the exhaust to release a lot of white smoke.

Possible causes (I think):

-- Bad fuel: I was using months old fuel with fuel storage stuff put in it.
-- Bad Carbs: Which I have trouble believing because all the Pilot jets, main jets are clear. The diaphragm sliders work great.
-- Bad Spark Plugs: I replaced them with new ones
-- weak ignition coils: I tested each spark plug by grounding them to the frame and all worked exactly the same(lol I shocked my self once too, Not as bad as I thought it would be).
-- Stator: Not sure how it works and how it affects the spark plugs
-- Air delivery: I tried cleaning my stock air filter with K&N cleaner kit. By washing and spraying the product on it. I don't know if this could have cause the filter to get clogged instead of actually cleaning it.
-- Some other stupid thing that I might have missed when reassembling the bike

ALL the motorcycle gurus out there I call on you for help!!!!

Thank You for any of the support you guys give me
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Old March 18th, 2018, 08:31 PM   #2
akima
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Old March 18th, 2018, 09:02 PM   #3
maverick9611
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sounds like your timing is off. maybe cam chain jumped a tooth on reinstall.
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Old March 18th, 2018, 09:03 PM   #4
TrickyTriggs
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Quote:
Originally Posted by maverick9611 View Post
sounds like your timing is off. maybe cam chain jumped a tooth on reinstall.
Would it be better if I made a youtube video to show you exactly what I did?
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Old March 19th, 2018, 07:44 AM   #5
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Old March 19th, 2018, 10:23 AM   #6
TrickyTriggs
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I forgot to mention, all the valves are opening at the same time, what could be the cause of this exactly????
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Old March 19th, 2018, 01:02 PM   #7
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Quote:
Originally Posted by TrickyTriggs View Post
I forgot to mention, all the valves are opening at the same time, what could be the cause of this exactly????
You sure? All 16 of them? Or were you seeing pairs of them opening?
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Old March 19th, 2018, 02:24 PM   #8
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You might want to do a compression test and see if maybe the cams are out of time and if you have any bent valves.
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Old March 19th, 2018, 10:58 PM   #9
TrickyTriggs
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Quote:
Originally Posted by DannoXYZ View Post
You sure? All 16 of them? Or were you seeing pairs of them opening?
I checked the valves again and I was wrong the valves do open at different times, the changes were so small I didn’t notice it
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Old March 20th, 2018, 01:33 AM   #10
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Old March 23rd, 2018, 10:03 PM   #11
TrickyTriggs
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Name: Tommy
Location: Glastonbury
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Motorcycle(s): 1995 RF900R, 1996 GS500E

Posts: 65
Here is a video of me doing the timing for my rf900r, can anybody tell me if I did it correctly?
https://m.youtube.com/watch?v=d0x8A_ekqCg
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Old March 30th, 2018, 06:29 AM   #12
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Old April 16th, 2018, 08:29 PM   #13
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