The Sensible Twin

[Triplenut]

Hi Greg,
good to see you making some progress on this.

I have an FZR thou fibreglass copy tail piece FOC if you want it ?
Was originally on my first FZ race bike, white with red stripe.


Cheers
DR

[TZ350]

Attachment 332411

I was traveling in the South Island this week and made the pilgrimage out to Grumps place. Where he was working on his latest project, the twin cylinder 150 made from cutting down a four cylinder engine and crank.

Attachment 332410Attachment 332412

Even though the original four cylinder motor looks quite bulky it is much lighter than I thought. The half crank is very light and the primary drive and gearbox is much lighter than comparable FXR150 parts.

But the best part is that the twins RPM ceiling is about 18,000 rpm while the FXR150 is about 12,000. There is big performance possibilities in that extra 6,000.

[mr bucketracer]

Attachment 332411

I was traveling in the South Island this week and made the pilgrimage out to Grumps place. Where he was working on his latest project, the twin cylinder 150 made from cutting down a four cylinder engine and crank.

Attachment 332410Attachment 332412

Even though the original four cylinder motor looks quite bulky it is much lighter than I thought. The half crank is very light and the primary drive and gearbox is much lighter than comparable FXR150 parts.

But the best part is that the twins RPM ceiling is about 18,000 rpm while the FXR150 is about 12,000. There is big performance possibilities in that extra 6,000.

good stuff rob making it to the masters place

[Grumph]

good stuff rob making it to the masters place

He did very well finding me at all...

Good to have some time to discuss things away from the pressure of a race day.

Edit - The good looking stock crank I'm holding is one of the ones from Husa - the alternator end is broken off it. Prob accident damage....

[ellipsis]

...I thought Grumph was a really old and wizened featured chap, not that young looking, finely sculpted chap...are you sure that is not an imposter or you went to the wrong house?...

[Grumph]

...I thought Grumph was a really old and wizened featured chap, not that young looking, finely sculpted chap...are you sure that is not an imposter or you went to the wrong house?...

I looked at that and thought, shit photos CAN lie....LOL

Next passport pic you need Neil, book a visit from Rob.

[husaberg]

He did very well finding me at all...

Good to have some time to discuss things away from the pressure of a race day.

Edit - The good looking stock crank I'm holding is one of the ones from Husa - the alternator end is broken off it. Prob accident damage....

Aye it was broken when husa got it, Fyi Speedpro has the other end and mag rotor.
I gave a head to either Scott or Neil i can't remember who?
I still can't find any spare cam covers but i did find a piston and rod the other day Greg.
I am over at shefield for Rugby on the 16th Greg, if you want me to drop it at the garage?

[Grumph]

Aye it was broken when husa got it, Fyi Speedpro has the other end and mag rotor.
I gave a head to either Scott or Neil i can't remember who?
I still can't find any spare cam covers but i did find a piston and rod the other day Greg.
I am over at shefield for Rugby on the 16th Greg, if you want me to drop it at the garage?

Thanks but no. Got more than enough std pistons. And enough rods.
Hororata swap meet is the 16th.....

[mr bucketracer]

Aye it was broken when husa got it, Fyi Speedpro has the other end and mag rotor.
I gave a head to either Scott or Neil i can't remember who?
I still can't find any spare cam covers but i did find a piston and rod the other day Greg.
I am over at shefield for Rugby on the 16th Greg, if you want me to drop it at the garage?

I got a head of you ,can't remember if it have a cam cover with it

[Grumph]

To enlarge on what I said - I picked up another motor from Seraph down Timaru way which has a dropped valve on the LHS but is complete so no more yam bits needed.
What I could use is another pair of gsxr400 pistons and rings. GK71B I think - the first version 400.

[Grumph]

Well, while waiting for a couple of ignition boxes, I got the subframe done.
To make Drew happy I did it in 5/8in 16G mild. Bronze welded.
When i get the chance, I'll set up the scales and see how much lighter than the cut OE subrame it is.
The TZ G/H seat doesn't look too bad tacked onto the alloy beam frame IMO - and I just fit onto it, LOL.

[Buddha#81:Me]

The TZ G/H seat doesn't look too bad tacked onto the alloy beam frame IMO - and I just fit onto it, LOL.

I'm guessing you don't want me to ride it........ there is no way ill get my fat guts in between the tank and seat

[robajs]

the bike is so bloody tiny most full size adults would find it a tight fit! let alone those of us who are plus size units
happy to lift that motor in and out......the gs motors and that blood laverda were heavy.

[Grumph]

I'm guessing you don't want me to ride it........ there is no way ill get my fat guts in between the tank and seat

You might be surprised - I'm probably as portly as you now. When I get around to doing a tank cover and small in frame tank, the bloody cover will certainly be a lot lower...I remember the last shop 250 Suzuki at McCleary's, the back of the tank was cut at 45 deg to let Tommy fit on it. Just like Neil's bucket....
The distance to seat/seat to pegs is pretty much the same as my F3 kawasaki 500 - which I fitted when I was a tad slimmer....
Anyway, I've only got to ride it to sort the carburation....

[husaberg]

bump.............