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Topics - Bristolbadger

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CB750 / 750 roundtop carb exploded!
« on: July 17, 2022, 02:28:52 PM »
... No not literally but this image has helped me out a bunch of times. Hope you find it as much help too :)

As you were

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CB750 / Intake boots for roundtop carbs
« on: June 07, 2022, 06:07:01 PM »
Evening all, I've just got back from a ride and though I'm due to balance my carbs was thinking how out they've suddenly become... so after a brew and closer inspection I've got a split intake boot on no.4 and possibly 3.

Anyone got a set or recommend any sensibly priced ones please? I might as well replace them all as a set.

Cheers guys

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CB750 / Help! What's caused this?
« on: March 25, 2022, 03:15:32 PM »
Hi folks, I'm properly gutted after I finally finished my k3 750 sohc, got her MOT'd and finally on the road and driving sweet. After 30 or so fairly gentle shakedown miles I decided to pop the cover and check valve clearances and re-torque all the bolts... only to discover the cam seemed off centre on the right side holder...
Low and behold the horror in the pics! I'm mortified to say the least after 2yrs of ground up build.

What could have caused this? Only a bent camshaft that I can think of as I did a full bench check to check oil circulation to the head and all metering jets were clear and oil was getting up to the journals and everywhere nicely. Was getting good running pressure with a gauge attached to the pressure sender initially and also no oil light warning (yes the pressure switch is working) when I was riding it with that back in.

The left side cam holder/journals and camshaft are fine and unmarked as was everything up there when I assembled the engine.

I can't vouch for the straightness of the camshaft when I got the bike so I guess its possible the cam had been dropped or bent and I just had a dodgy one to start with.

Not sure my best course of action now?
 I'll strip all the parts off and take the cam fully off and investigate for any further damage I guess but then best case scenario is me left looking for a second hand camshaft and right side holder and journals. F**k f**k f**k!

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Announcements / 750 Ignition coils
« on: January 23, 2021, 12:08:55 PM »
Watcha folks, I'm looking for a set of ignition coils for my bike, don't have a fortune to spend and want to retain the points timing. If I understand correctly it's not wise to run 3 ohm coils as they put too much strain on the charging system which is a shame as I have one new 3ohm coil and was going to get another and then the plug caps for both.

However I though I'd see if anyone has a pair of working used 5 ohm they want rid of?... or could point me to a reasonable priced new pair that would fit me.

Cheers in advance,

CB750 / Rocker cover bolts
« on: July 04, 2020, 09:09:17 AM »
Hi all, I'm after a set of stainless rocker cover bolts for my 750 k3.
Anyone know a good source please? UK preferred.

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