Bike Back together still runs like #$%&
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Bike Back together still runs like #$%& - 8/13/2008 6:02:51 PM
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cba4
Posts: 49
Joined: 3/11/2008
Status: offline
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OK so I installed a new petcock (old one leaked when not in the on pos.), a new fuel cut off switch (pump wasn''t priming when key turned on), tank cleaned (fair amount of rust) and new gas.
The pump still doesn''t prime when the key is turned but does as soon as the starter is pushed. After a few seconds it fires up. It will rev to redline with small amount of hesitation. I took it around the block and it wouldn''t wind out at all, it almost died trying to go into third gear.
A year ago my friend had a stage 1 jet kit put on as well asnew headers + D&D exhaust.
Has anyone had a similar prob or suggestions on the next step to take?
Thanks in advance!
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RE: Bike Back together still runs like #$%& - 8/17/2008 10:21:13 PM
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Billistic
Posts: 174
Joined: 9/20/2007
From: Denver, CO
Status: offline
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Need more info first of all. If the tank was rusted, did you check the filter in the tank, the filter inline before the pump? Air cleaner? Exhaust restrictions?
"The pump still doesn''''t prime when the key is turned but does as soon as the starter is pushed."
That is what''s supposed to happen.
How about the carbs...
_____________________________
Speed limit....... what speed limit ??!!!!
1988 Hurricane 600
Dynojet carb kit, K & N filter, F1 pipe
Pirelli Sport Demon 150/70/17 rear, 110/70/17 front
-1 front sprocket, +2 rear sprocket
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RE: Bike Back together still runs like #$%& - 8/17/2008 10:50:08 PM
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cba4
Posts: 49
Joined: 3/11/2008
Status: offline
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When I replaced the petcock I replaced the filter as well. I just ran some seafoam through it and it runs a little better but still has no power. The inline filter is clean as well. I had read on a lot the posts about the pump priming when the key is turned not when the starter is pushed. This is the first bike I''ve owned with a fuel pump (all the rest have been grav. fed) so I was a little confused on that point.
I haven''t pulled the carbs yet to check how bad they are. The bike will at least now run past 20 and rev fairly smoothly while in nuetral.
I downloaded the specs from dynojet on which jets should be in the bike, so my next step is to pull the carbs this week.
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RE: Bike Back together still runs like #$%& - 8/21/2008 9:37:33 PM
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cba4
Posts: 49
Joined: 3/11/2008
Status: offline
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Update:
Took off air box and carbs and this is what I found:
1. UNI air filter (not K&N as I was told)
2. Filters around the inlet Tubes (mesh cylinders in air box) rotted to falling off
Pulled carbs -
3. carbs pretty dirty (not the worst I''ve seen but dirty and strong varnish smell)
4. Main jet = 116 (was told that a stage 1 jet kit installed) - looked on dynojets site found that the 116 are used on stage 2 with drilled air box, and stock exhaust.
5. Needle jet set correctly on 3rd clip
6. Slides seemed stuck in place
7. bike has full D&D exhaust from headers back to muffler
The plan:
1. clean the &*^% out of the carbs (possibly replace all o-rings gaskets while in there).
2. replace uni with K&N filter
3. button her up and see how she runs.
Any Suggestions, warnings or advise?
_____________________________
HABETIS BONA DEUM
1988 CBRF 600 Hurricane
1984 CB700 SC Nighthawk
1983 KX500
1993 KX500 (SuperMoto project)
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RE: Bike Back together still runs like #$%& - 8/22/2008 10:21:37 AM
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Juggalo_X
Posts: 81
Joined: 6/18/2008
Status: offline
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IF the jest your running require an air box modification id do that as well.
no power can be a form of a very rich running situation. and if your getting more fuel and not enough air that will = no power.
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RE: Bike Back together still runs like #$%& - 8/22/2008 11:30:59 AM
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cba4
Posts: 49
Joined: 3/11/2008
Status: offline
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I am trying to find the template described in the dynojet instructions for drilling the airbox (DIF22 insert) but have been unable to find it.
I also have been trying to find a picture of the jet kit (my needle jet looks different then what I am seeing so far. The bottom part of the needle does not taper until 1/3 up the shaft
_____________________________
HABETIS BONA DEUM
1988 CBRF 600 Hurricane
1984 CB700 SC Nighthawk
1983 KX500
1993 KX500 (SuperMoto project)
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RE: Bike Back together still runs like #$%& - 8/22/2008 4:32:21 PM
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camoweasel
Posts: 176
Joined: 6/28/2007
Status: offline
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Last I checked the kit, there is no template about drilling the airbox. Just the carb slides. The 3rd clip position is actually the stage 1 setting and like you mentioned the 116 is the stage 2 jets. That setting shouldn''t be a problem. I knocked off 1 second on my 1/4 ET by switching to the stage 1 needle setting. I''ve always been weery of drilling the airbox. From what I read the carbs are controlled by airbox pressure. I''m running a full exhaust and K&N as well plus an ignition advancer. My main jets are actually the stock 110a which is equal to Dynojet 106s about 2 sizes bigger then the stage 1 jets and runs great.
_____________________________
1990 Honda CBR600F
K&N filter (removed air tubes under lid)
Yoshimura header with Vance & Hines SS2-R muffler
Factory Pro 6 degree Ignition Advancer
jetted
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RE: Bike Back together still runs like #$%& - 8/23/2008 4:40:45 PM
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tds94probe
Posts: 265
Joined: 10/18/2007
Status: offline
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the pump turns on as soon as the key is turned, the 3rd clip on the needles is used for stage 1 and stage 2, the only difference is the main jet size.
What are your mixture screws set at? Should be 2.5 turns.
How do your plugs look? Are they fouled?
< Message edited by tds94probe -- 8/23/2008 4:42:16 PM >
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RE: Bike Back together still runs like #$%& - 8/31/2008 7:30:49 PM
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cba4
Posts: 49
Joined: 3/11/2008
Status: offline
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So I finally had time to tear down the carbs and clean them. I now have clean carbs with actually moving slides and unclogged jets. I just buttoned everything up about 2 hrs ago with the new K&N filter and started the bike. It took about 20 sec before she purred to life. The bike sounds great, loud but great. I took it for a spin around the block.
This is what I found:
Idles fine and starts to rev smoothly until 1/4 throttle
1/4 throttle it starts to loose power and stutter = needle jet out of position (currently 3rd setting from top) - too much fuel right?
I try to let it slowly build to see if it will clear up and run wide open but it wouldn''t make it to full throttle = main jet too large, but since I couldn''t get it there I don''t know. (main jet 116)
Plan:
start with needle jet move to position 2nd from the top (less fuel right) and see how it does.
Any suggestion on what I might be missing would be appreciated.
_____________________________
HABETIS BONA DEUM
1988 CBRF 600 Hurricane
1984 CB700 SC Nighthawk
1983 KX500
1993 KX500 (SuperMoto project)
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RE: Bike Back together still runs like #$%& - 9/1/2008 5:54:04 AM
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tds94probe
Posts: 265
Joined: 10/18/2007
Status: offline
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did you do your airbox mod?
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RE: Bike Back together still runs like #$%& - 9/1/2008 7:26:54 AM
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cba4
Posts: 49
Joined: 3/11/2008
Status: offline
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No, I took out the mesh tubes and left everything open to the new K&N filter. I was afraid to drill the box (can''t undo it).
_____________________________
HABETIS BONA DEUM
1988 CBRF 600 Hurricane
1984 CB700 SC Nighthawk
1983 KX500
1993 KX500 (SuperMoto project)
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