Team GPR

[mr bucketracer]

back on to this old puppy , new cams to match injection, map

[TALLIS]

Will it be ready for next kaitoke round?

[mr bucketracer]

Will it be ready for next kaitoke round?

only left it at a 125cc

[seymour14]

Stacking those pieces together, mmmmmm yummy!!

Barrel and sleeve together, Head needs a spark plug tap put down it and then adjusted for height. Nicosil cost $480 so Regan tells me.

Tomorrow is D-Day for pushing my bottom plate with the curved fingers into place, then it is a matter of giving it to Dad, whereupon he has a precise mandrel to push the whole barrel on and quietly face both ends to get it square and to length. The keen eyed can now look at my exhaust stubs to see what I've been up to, ability to modify as required.

At that point job done, should make it out for the North Island Series and we can see what this puppy has.

Can't wait, some two stroke history in the offing...

[Grumph]

How far does the crack in the top barrel fin extend ?

[seymour14]

The barrel fins were all two pieces. The lowest ones were pushed into place (slightly spigotted into the barrel) and welded front and back, then cleaned up. The next "two piece" fin would then be pushed together and welded and so forth. The crack is just the join mark of the lefthand and righthand part of each fin. They are solid as, so not worried about them.

If there was any worry, it is that the gap between fins may be too narrow, I think the heat dispersal will come from the head though mostly, and the barrel not so much. Testing will prove what needs to happen next.

[Grumph]

The barrel fins were all two pieces. The lowest ones were pushed into place (slightly spigotted into the barrel) and welded front and back, then cleaned up. The next "two piece" fin would then be pushed together and welded and so forth. The crack is just the join mark of the lefthand and righthand part of each fin. They are solid as, so not worried about them.

If there was any worry, it is that the gap between fins may be too narrow, I think the heat dispersal will come from the head though mostly, and the barrel not so much. Testing will prove what needs to happen next.

fair enough. when finished, spray with black etch prime. It will help...

[seymour14]

We used to spray paint our rotary moulding castings with black to pull heat into certain areas. Silver was used to draw heat away from other areas.

Not sure about the net effect on a barrel and head, but I will be doing a MadMax4 and spray painting my lips chrome silver so that I can dine with the motorcycling gods if I pull this off... LOL!!

Good old Maori chrome fixes anything!

[mr bucketracer]

We used to spray paint our rotary moulding castings with black to pull heat into certain areas. Silver was used to draw heat away from other areas.

Not sure about the net effect on a barrel and head, but I will be doing a MadMax4 and spray painting my lips chrome silver so that I can dine with the motorcycling gods if I pull this off... LOL!!

Good old Maori chrome fixes anything!

lol ................

[kel]

I think the heat dispersal will come from the head though mostly, and the barrel not so much.

yeah nah. The exhaust gases go out the exhaust port, and when you over rev they'll even go back down the transfer ducts. My cylinder gets stupidly hot, note the hot spot is on the cylinder fins just above the exhaust duct exit



Your cylinder mounting holes are wide spaced, what bottom end is it bolting up to, an RG150?

[seymour14]

yeah nah. The exhaust gases go out the exhaust port, and when you over rev they'll even go back down the transfer ducts. My cylinder gets stupidly hot, note the hot spot is on the cylinder fins just above the exhaust duct exit



Your cylinder mounting holes are wide spaced, what bottom end is it bolting up to, an RG150?

Very close, think green. We are eco friendly...

Food for thought with your hot spot imaging, that's where Regan's super duper cooling creation comes in. Hope to get a finished photo up in the not to distant future.

[husaberg]

Very close, think green. We are eco friendly...

Food for thought with your hot spot imaging, that's where Regan's super duper cooling creation comes in. Hope to get a finished photo up in the not to distant future.

Has it ever been in a river?

[seymour14]

Has it ever been in a river?

Not to sure, but it has been in the air...

[mr bucketracer]

Has it ever been in a river?

the other was but was the one the idea came from

[chrisc]

Stacking those pieces together, mmmmmm yummy!!

Barrel and sleeve together, Head needs a spark plug tap put down it and then adjusted for height. Nicosil cost $480 so Regan tells me.

Tomorrow is D-Day for pushing my bottom plate with the curved fingers into place, then it is a matter of giving it to Dad, whereupon he has a precise mandrel to push the whole barrel on and quietly face both ends to get it square and to length. The keen eyed can now look at my exhaust stubs to see what I've been up to, ability to modify as required.

At that point job done, should make it out for the North Island Series and we can see what this puppy has.

Can't wait, some two stroke history in the offing...

Beautiful work mate. Can't help but notice that sharp edges on the transfer port divider/septum and the sharp edge on the inner cylinder wall.




Although the cylinder septums aren't sharp, rather blocky, the sharp edges do deserve this beautiful wobbly quote

Sharpen the transfer septums and I will personally bend you over and do horrid things with your arse.
Sharp leading edges are used on supersonic aircraft, when your transfer flow goes supersonic then so will the bike.
Look at the fastest two stroke in the worlds septum, does that look sharp???