Thinking about a new project - Page 2

CasterTroy · 10-02-2009, 03:45 PM

It's actually a CB550

Quote:

im pretty sure the problem either has to do with the starter or the transmission. when i try to start it electrically, it just clicks and when i try to kick start it, i get about 3/4 of the way down before the kick start just stops. i know it's not the battery because ive fully charged it

goof2 · 10-02-2009, 04:10 PM

Does the engine actually turn for that 3/4 of kick lever movement? I'm not familiar with that bike so this is just my gut feeling, but it sounds like it may have a seized engine. I would still look in to parts and mods (big bore kit?) to see what can be done if the bike is the right price. Buy it with the assumption it has a seized motor. If it doesn't it is a bonus.

shmike · 10-02-2009, 04:16 PM

Quote:

Originally Posted by goof2

Does the engine actually turn for that 3/4 of kick lever movement? I'm not familiar with that bike so this is just my gut feeling, but it sounds like it may have a seized engine. I would still look in to parts and mods (big bore kit?) to see what can be done if the bike is the right price. Buy it with the assumption it has a seized motor. If it doesn't it is a bonus.

Yep.

Sounds locked up to me.

Looks like a 750 swap in the making.

OneSickPsycho · 10-02-2009, 05:41 PM

Quote:

Originally Posted by shmike

Yep.

Sounds locked up to me.

Looks like a 750 swap in the making.

That's what I'm thinking... What's the damage Troy?

nhgunnut · 10-02-2009, 05:55 PM

I played wuth a 77 CB750F a few years ago that the Mid 70s bike have difficulty with intake valves still is it short money the single cams are cool bikes. DO you know if it started as a F or a K Bike? It would tepmpt the hell out of me. I have to go pick up a 74 Cb750 K next weekend (someone is giving it to me) Know any one who is willing to tell my wife I am getting 5th bike?

RACER X · 10-08-2009, 02:22 PM

other then engine being frucked, thats a cool bike.

askmrjesus · 10-08-2009, 07:19 PM

Quote:
im pretty sure the problem either has to do with the starter or the transmission. when i try to start it electrically, it just clicks and when i try to kick start it, i get about 3/4 of the way down before the kick start just stops. i know it's not the battery because ive fully charged it

That almost makes sense, except for the transmission part.

If it was truly seized, you wouldn't be able to kick it at all, let alone 3/4's of the way. If he's able to kick it 3/4's of the way repeatedly, the problem is more likely with the kickstarter itself (broken teeth, fucked up spring).

JC

shmike · 10-08-2009, 07:42 PM

Quote:

Originally Posted by askmrjesus

Quote:
im pretty sure the problem either has to do with the starter or the transmission. when i try to start it electrically, it just clicks and when i try to kick start it, i get about 3/4 of the way down before the kick start just stops. i know it's not the battery because ive fully charged it

That almost makes sense, except for the transmission part.

If it was truly seized, you wouldn't be able to kick it at all, let alone 3/4's of the way. If he's able to kick it 3/4's of the way repeatedly, the problem is more likely with the kickstarter itself (broken teeth, fucked up spring).

JC

I'm thinking that there is enough play that the kick starter doesn't catch until the 3/4 mark, then doesn't budge.

If it were simply a fubar'd kicker, the electric starter should turn the motor.

Of course he may have "fully charged" a worthless battery and totally ruined my theory.

askmrjesus · 10-08-2009, 09:18 PM

Quote:

Originally Posted by shmike

I'm thinking that there is enough play that the kick starter doesn't catch until the 3/4 mark, then doesn't budge.

If it were simply a fubar'd kicker, the electric starter should turn the motor.

Of course he may have "fully charged" a worthless battery and totally ruined my theory.

The battery is a liar...

You're right, he could have surface charge, but no amps to back it up.

I could see maybe a 1/4 turn worth of play, but 3/4? Nah. Not buying it. (the theory, not the bike).

Troy, for me it's a no go with the 550 motor. Too much weight without enough power. I would be tempted to squeeze a CB750 motor into it, or go the opposite direction, and put a CB350 in there, and save on weight.

Decisions, decisions...

JC

BobTheBiker · 10-09-2009, 12:42 AM

You need to get over on SOHC4.net and get some info from peeps that know their shit on these old school mofos.

10-02-2009, 05:55 PM	#15
nhgunnut gun totin redneck Join Date: Apr 2008 Location: South West New Hampshire Moto: turbo busa 999 Duc Goldwing & Victory Posts: 1,130	I played wuth a 77 CB750F a few years ago that the Mid 70s bike have difficulty with intake valves still is it short money the single cams are cool bikes. DO you know if it started as a F or a K Bike? It would tepmpt the hell out of me. I have to go pick up a 74 Cb750 K next weekend (someone is giving it to me) Know any one who is willing to tell my wife I am getting 5th bike? __________________ Evolution requires a body count, Count or be Counted!

10-08-2009, 02:22 PM	#16
RACER X AMA Supersport Join Date: Nov 2008 Location: Richmond, Tx Moto: '10 Tuono Factory Posts: 4,569	other then engine being frucked, thats a cool bike. __________________ ΜΟΛΩΝ ΛΑΒΕ 2014 GROM! 181cc of FURY 2010 Aprilia Tuono Factory - SOLD 2009 SFV Gladius - SOLD 2008 Hayabusa - SOLD.

10-08-2009, 07:19 PM	#17
askmrjesus Soul Man Join Date: Nov 2008 Location: Everywhere, all the time. Moto: '0000 Custom Turbo Cross (with jet kit). Posts: 6,481	Quote: im pretty sure the problem either has to do with the starter or the transmission. when i try to start it electrically, it just clicks and when i try to kick start it, i get about 3/4 of the way down before the kick start just stops. i know it's not the battery because ive fully charged it That almost makes sense, except for the transmission part. If it was truly seized, you wouldn't be able to kick it at all, let alone 3/4's of the way. If he's able to kick it 3/4's of the way repeatedly, the problem is more likely with the kickstarter itself (broken teeth, fucked up spring). JC __________________ The way things are going, they're gonna crucify me.

10-02-2009, 04:10 PM	#12
goof2 AMA Supersport Join Date: Feb 2009 Posts: 4,756	Does the engine actually turn for that 3/4 of kick lever movement? I'm not familiar with that bike so this is just my gut feeling, but it sounds like it may have a seized engine. I would still look in to parts and mods (big bore kit?) to see what can be done if the bike is the right price. Buy it with the assumption it has a seized motor. If it doesn't it is a bonus.

10-09-2009, 12:42 AM	#20
BobTheBiker too much time on my hands Join Date: Jul 2008 Location: the northern district of god damn Moto: 01 ZX6R, looking for more now. Posts: 1,802	You need to get over on SOHC4.net and get some info from peeps that know their shit on these old school mofos.