CB750K8 Project

[martin_uk]

Cleaning up engine parts

2015_0225eng0003 by nitram2010, on Flickr

2015_0225eng0001 by nitram2010, on Flickr

Front mudguard is not too pretty, but dont want to pay for repro one at moment

2015_0225eng0007 by nitram2010, on Flickr

[martin_uk]

Reassembly of crank cases stalled as I found the drive sprocket shaft seal in kit I had did not fit later larger shaft on K8, so had to order one up from DSS.

It may be possible to fit seal after crank cases together but decided to wait

[Bitsa (Ralph Wright - RIP)]

Wise man Martin have it all ready mate
Cheers
Bitsa

[martin_uk]

Crank cases now together, just waiting for rebored cylinders.

On my last install, I left fitting of starter motor, oil filter, oil pump, sump, alternator/ rotor and cover, clutch and selector parts until engine in and will probably do same again.

My rationale is it makes engine quite a bit lighter and easier to handle and as I have a bike lift it is not difficult to fit these after.

[Bitsa (Ralph Wright - RIP)]

Like your other post well impressed wish you all the best you deserve it for all your efforts brilliant
Cheers
Bitsa

[martin_uk]

Like your other post well impressed wish you all the best you deserve it for all your efforts brilliant
Cheers
Bitsa

Thanks Bitsa, it is nice when you get to reassembly stage

[UK Pete]

Crank cases now together, just waiting for rebored cylinders.

On my last install, I left fitting of starter motor, oil filter, oil pump, sump, alternator/ rotor and cover, clutch and selector parts until engine in and will probably do same again.

My rationale is it makes engine quite a bit lighter and easier to handle and as I have a bike lift it is not difficult to fit these after.

quite agree the less on it the easier it gets, you do some really good work martin and really show us up for being so slow keep it up fella its great to see your progress
pete

pete

[martin_uk]

Crank cases now together, just waiting for rebored cylinders.

On my last install, I left fitting of starter motor, oil filter, oil pump, sump, alternator/ rotor and cover, clutch and selector parts until engine in and will probably do same again.

My rationale is it makes engine quite a bit lighter and easier to handle and as I have a bike lift it is not difficult to fit these after.

quite agree the less on it the easier it gets, you do some really good work martin and really show us up for being so slow keep it up fella its great to see your progress
pete

pete

I hope my updates help inspire/motivate others, but it is difficult to keep motivated in the cold weather.

The K8 tank is finished but as it is over 100 miles away I wont be able to collect until week after next

[Bitsa (Ralph Wright - RIP)]

With you there Martin its so cold here and the moment I get an urge I open the garage door and in seconds all and sunder is wet.Shut door and not touch a thing.Does iss me off big time
Cheers
Bitsa

[martin_uk]

Started on the head.

Most of valves semi seized and had to be tapped out of head.

2015_0228eng0018 by nitram2010, on Flickr

2015_0228eng0011 by nitram2010, on Flickr

2015_0228eng0012 by nitram2010, on Flickr

Cleaned up, I use a bench electric wire brush and finish with emery cloth with valve in pillar drill.

2015_0228eng0023 by nitram2010, on Flickr

2015_0228eng0021 by nitram2010, on Flickr

2015_0228eng0027 by nitram2010, on Flickr

I will see if valves lap in OK

[martin_uk]

A couple of the exhaust seats will need recutting.

2015_0301eng0003 by nitram2010, on Flickr

Others OK

4 of valves have worn or pittedstem tops.

2015_0301eng0009 by nitram2010, on Flickr

Hopefully can find some used spare ones in my stash in shed

[martin_uk]

Found some spare valves but all the earlier type with wide collet groove

Dont realy want to mix different collets

[martin_uk]

DSS is £35 for exhaust valve and £27.20 for inlet, CSMNL is E54 and E49 !

 Found 1 exhaust on Ebay UK for £15 inc and 1 exhaust and 2 inlet from Ebay France for £45.

Current spend including purchase is £3500 and still need to sort seat and 1 exhaust!!

[martin_uk]

Stripped carbs yesterday and on reassembly found one of the float bowl screw thread in body was stripped 

I have helicoils for M5 and M6, but not M4

For some reason the M4 kit is 3x the cost of M5 one 

Does anyone know what size tap is used for M4 helicoil or is it a special size/pitch?

[ka-ja]

Hi,
    Helicoil taps are a specific size to suit the helicoil, and most helicoil sets include the appropriate tap and fitting tool for each size of coils in the set!---ken