Topic: My Seeley 750 Rescue Mission on a shoestring

[john campling]

My mate spent quite a long time talking to Colin Seeley at various events and said he was sick of talking about the CB750s and would talk all day about his trials bikes.
Thanks Col 

HAPPY CHRISTMAS TO ALL YOU LOT
MAY YOUR PARTS BE MERRY AND BRIGHT
and thanks for the info and tips

[john campling]

Sorry for the lack of action just doing a bit of work on the house which is sucking my time and money.
The plan is to sell my BMW R100 GS to make some room in the workshop and generate a bit of bike funds.
My Anti Pod filter has turned up from tintop looks the biz cant wait to fit it and my polyamide cam roller and sprocket from Poland also looks ace. I am pestering him to make some primary rollers but he is stuck on the rivet manufacture. I was thinking why can't this be a special shouldered bolt with a needle roller bearing with a big flat head and glued on nut with split pin ?
Any ideas ?

[nippon]

Pic above,.....should be a 38mm Ceriani with Lockheed brackets,....obviously wrong mounted.

Same fork here.

nippon

[scottly]

Nippon, what is your frame number? I'm guessing a later G number?

[Retro Rocket]

Pic above,.....should be a 38mm Ceriani with Lockheed brackets,....obviously wrong mounted.

Same fork here.

nippon

Nice, looks like a 1000cc Japauto block as well....

[nippon]

The frame number on the steering tube has been removed by German TUEV and replaced with a "TP-8" number for technical inspection to get it on the street in Germany.
This was a common method in the 70s and 80s in Germany if you did not get the bike from the official distributor or if there were records available to get it street legal.
In Germany no vin plate on a Seeley says "Seeley" as manufacturer,......on every Seeley vin plate is the name of the owner as manufacturer.
Offical distributor for Seeley frames in Germany was Gundolf Birke from Hannover,.....see the guy in the scan.
These bikes have had the SH-GER.... number.
This bike came from the Netherlands to Germany in 1980. Titled and licenced in the Netherlands on August 1976.

Battery bracket and swingarm shows "51 S",...so it should be a race frame,, i guess....no center stand bracket and no oil tank brackets.
So the frame number should be "551",......the number should match the licence date and it should be one of the last "K" series frames. Under the TP number you can see small fragments of the "S" for SH which every frame number started with.
But so far no luck to find out the complete history of the frame by previous owners. And it does not really matter to me. But for sure,.....it's a Seeley.
Last pic shows the condition of the frame when i have received it.

...and yes, it's a Japauto cylinder.

[john campling]

Nice looking bike good work

[john campling]

Here's what I did today
Took the head and barrels off together as it quickly became obvious it was not going to give up without a fight.
Cut some 60mm mdf disks which slotted in the bores like mdf pistons, just to protect the top of the combustion chamber.
Planed a bit of wood to fit in the bore and hit it with a hammer. The problem was getting enough grip to stop the cylinder block moving so I ratchet strapped it to the bench so it was resting on the wood in the bores and the carb inlets. I thought this might be enough to split it , not quite. So I gave a few taps with a hammer on the wood in the bore and off it popped.
Sorry for the trendy retro pics but my phone thinks it hasn't got enough memory to take regular pics

[john campling]

o the engine is apart and the head scratch continues measuring the crank etc.
I have modded the rear brake with a DOHC bol d'or type.
I had to mill a bit off the bracket to get it to fit the narrower Seeley swinging arm bit it has slotted in perfectly. I noticed the original brake bracket had been machined as well.
Also trying a mod on the front brake caliper arm. These are notorious for seizing so I thought a grease nipple might help. Obviously make sure the O rings are in good shape at the top and bottom of the spindle.
Time will tell on this
I got a used Newtronics reg/rec as well had a major headache trying to wire it up a couple of days stress till my friend pointed out I had the multi pin  connectors under the side panel crossed. Must have happened when I fitted the fusebox. It's weird how you can stare at something for days then some guy comes along and points out the bleedin obvious (very grateful he did) Thanks Nick

[john campling]

pics of DOHC brake

[john campling]

Machined and fits snugly

[john campling]

Got a digital micrometer today
Armed with Hondaman's book and Micrometer I will dive back into the measuring of the crank etc
Got a price from I cleenz macheenz to vapour/ glass blast the cases head and barrels
Not the cheapest you can trust him to do a great job

[john campling]

Cases head and barrel gone for cleaning this is where it starts for real

[john campling]

Just got a parcel from Dave Silver can start doing a few more bits now

[01Thomas]

It's been a year... any news on this project?

[scottly]

@Tim
...if you do it the wrong way, your frame will look like this Seeley frame. 

nippon

Bumping this thread.

[john campling]

4 years have passed with no action ( I do have a 3 yr old though) Time to start dusting off the bits and do it. Maybe sell some bikes ? First job new exhaust valves and re bush oil pump pinion.  Heavy duty primary chain worth it or not ?

[jaguar]

Probably worth it if you already have the motor apart for other stuff.

[john campling]

Hi Jag yeah it's totally stripped there were some guys in Holland or somewhere made them £200. I need to dig out the link

[john campling]

Gear box all in and good to go just need some more oil seals. It turns out I have an F2 output shaft which is thicker the the K one. The engine is between K6 and 7 according to engine numbers. Sell my CB-1 400 to get funds for the next parts order. Sad but tooo many bikes not enough time.