It *almost* started... (or rather, it started)

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It almost started... (or rather, it started)

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CBR >> Past CBR Models >> CBR 600F2 >> It *almost* started... (or rather, it started)

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It *almost* started... (or rather, it started) - 1/20/2008 6:38:20 PM

SpecR

Posts: 308
Joined: 10/19/2007
Status: offline

My project F2 almost started...

I had to switch up some of the plug cables, since they were hooked to the wrong terminals on the coils...

Now, with the choke fully on, instead of doing nothing when I crank it (and occasionally making a slight clanking noise), it'll rumble a bit after I crank it a lot, and it stops as soon as I stop running the starter. Right now I'm waiting for the battery to charge back up...lol

Any ideas?

I guess first I should pull the plugs, and check for wetness, wear, desposits, and spark. And maybe run a compression check while I'm at it.

< Message edited by SpecR -- 1/21/2008 9:04:05 PM >

Post #: 1

RE: It *almost* started... - 1/20/2008 7:19:52 PM

Foght

Posts: 119
Joined: 3/17/2007
Status: offline

100% chance the plugs are fouled.

(in reply to SpecR)

Post #: 2

RE: It *almost* started... - 1/20/2008 7:50:58 PM

SpecR

Posts: 308
Joined: 10/19/2007
Status: offline

Good...

I REALLY don't want to have to mess with the carbs.

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Post #: 3

RE: It *almost* started... - 1/20/2008 8:14:20 PM

Hershey

Posts: 668
Joined: 7/27/2007
Status: offline

I'd give it the 100% chance that it's the carbs, not the plugs.

Plugs dont foul themselves

< Message edited by Hershey -- 1/20/2008 8:18:49 PM >

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Post #: 4

RE: It *almost* started... - 1/20/2008 8:55:23 PM

SpecR

Posts: 308
Joined: 10/19/2007
Status: offline

They do when you crank the bike with the plugs firing in the wrong order... probably dripping with fuel by now.

(in reply to Hershey)

Post #: 5

RE: It *almost* started... - 1/20/2008 9:49:24 PM

Dj_Squatch

Posts: 341
Joined: 1/14/2008
Status: offline

yea my bike randomly didnt start anymore one day...it turned out to be a combo of the two..the float valve in one of the carbs was stuck open...which was flooding my engine..and from me running the bike this way and not knowing plus cranking it all flooded it fouled all of the plugs. Also while youve got it apart id check out your voltage regulator...thats the only other problem ive had...the stock plastic peice that pluged into it burnt to a crisp and i coulndt figure out why my battery was dying while i was riding.....i just got some of those little pin connectors from autozone and that fixed it.

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Post #: 6

RE: It *almost* started... - 1/21/2008 9:42:48 AM

SpecR

Posts: 308
Joined: 10/19/2007
Status: offline

It runs!

It made a hell of a noise with no muffler on it...lol

At the moment I'm confused as to whether the Choke is ON (ie, closed) when the lever is TIGHT or LOOSE.

Once it warmed up, it only wants to run (and with a higher idle) when the lever/cable is tight.

Also, how long does it take the radiator fan to come on? The headers are already hot enough to melt zip-ties so I figure it shouldn't take as long as it has (it hasn't come on yet).

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Post #: 7

RE: It *almost* started... - 1/21/2008 10:29:36 AM

amanc96

Posts: 52
Joined: 12/16/2007
Status: offline

When the cable's tight, i think the choke's on.

(in reply to SpecR)

Post #: 8

RE: It *almost* started... - 1/21/2008 11:19:55 AM

SpecR

Posts: 308
Joined: 10/19/2007
Status: offline

At the moment, it's got some hard starting (only starts at full throttle), cuts off if I turn the choke off, and it cuts off after a while.

(in reply to amanc96)

Post #: 9

RE: It *almost* started... - 1/21/2008 11:37:38 AM

Hershey

Posts: 668
Joined: 7/27/2007
Status: offline

Carbs :D

When the choke is pulled down it's on.

Fan comes on when it's really hot, mine doesn't come on until my bike has been sitting for like 1/2 hour running with no wind circulation.

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Post #: 10

RE: It *almost* started... - 1/21/2008 11:44:16 AM

plastikmelter

Posts: 106
Joined: 11/30/2005
From: Virginia
Status: online

i agree with hershey. if youre getting it to start up and its running all funky like that, the carbs need to be looked at. have no fear though! they arent as bad as you think!

also, why are there zip-ties on your header?

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Post #: 11

RE: It *almost* started... - 1/21/2008 2:00:51 PM

SpecR

Posts: 308
Joined: 10/19/2007
Status: offline

Not on the header... I was using a zip-tie to keep the fan wiring in place, and the long end was hanging down and touching the headers (which get hotter like 5X as fast as stock manifold on my RX-7...).

I've got two sets of carbs... I think I'll pull the "bad" apart for fun :p (gives me something to do since I don't live where I keep the bike...)

How hot should the engine be before I can check the ignition timing?

BTW, I broke the stock T-connector for the fuel and replaced it with a vacuum T from Advanced auto... Should I switch it to the one that's on the other carbs? Is it a filter or something special that NEEDS to be on the bike?

(in reply to plastikmelter)

Post #: 12

RE: It *almost* started... - 1/21/2008 2:34:04 PM

Dj_Squatch

Posts: 341
Joined: 1/14/2008
Status: offline

ooooooh an rx-7????? hot hot hot

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Post #: 13

RE: It *almost* started... - 1/21/2008 9:55:49 PM

Hershey

Posts: 668
Joined: 7/27/2007
Status: offline

The T junction is nothing special, it's fine.

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Post #: 14

RE: It *almost* started... - 1/22/2008 4:01:34 PM

SpecR

Posts: 308
Joined: 10/19/2007
Status: offline

I started breaking down my other carbs, and I realized that the stock T-connector is probably 20-30% bigger (in terms of ID) than the generic one I put on my bike... this might be choking my fuel off when I get off the choke (which is designed to suck more fuel into the engine).

(in reply to Hershey)

Post #: 15