Thread: #6

**speedpro** · 31st October 2009, 18:46

progress, got the spring mounts fitted today and have started on the muffler and tailpipe, gotta do a nozzle as well.

**speedpro** · 8th November 2009, 18:28

Got to decide whether to weld the tailpipe on or spring mount it, and make a pipe mount and she's all done, plus muffler packing and a few rivets. It's got a few bends but fits round everything nicely.

**F5 Dave** · 8th November 2009, 19:51

So now all you have to do now is train Cricket to ride it, 'cause you're never going to fit it.
Seriously. I have trouble folding up enough.

**TZ350** · 8th November 2009, 20:01

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Nice looking work Speedpro.

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**Buckets4Me** · 10th November 2009, 05:59

Originally Posted by F5 Dave

So now all you have to do now is train Cricket to ride it, 'cause you're never going to fit it.
Seriously. I have trouble folding up enough.

I'm taller than you and I manage

but I have four other bodies to try out as this one wears out on me

**speedpro** · 10th November 2009, 17:42

Unfortunately i only seem to have been issued with one body and it aint as good as it used to be.

**Buckets4Me** · 11th November 2009, 18:17

Originally Posted by speedpro

Unfortunately i only seem to have been issued with one body and it aint as good as it used to be.

so it dont fold up like it needs to to fit that frame

give you $200 for the bike ?

ps you do have a spare body and he is getting old enough to ride it ?

**Damien_Toman** · 19th November 2009, 23:54

The body and bike going well. Mt Wellington 14 Nov 09. See photo.

**speedpro** · 30th November 2009, 20:16

Thanks to John I've tried two pipes on the bike on his dyno. The pipe I'm using normally had a quite nice powerband and surprisingly the old one from the original #6 which was good for 22.5hp did make a tiny bit more power in comparison but it hit a wall and made the engine pop and bang. The current pipe has a nice overrev and dynos just how it feels. I have a change to make and I'm going to build a new pipe with replaceable cones and adjustable centre section. I'll probably make it plug-n-play on the stinger as well and then head back.

**Buckets4Me** · 2nd December 2009, 19:26

any hint as to what it's making at the moment

**Sketchy_Racer** · 2nd December 2009, 21:50

Originally Posted by Buckets4Me

any hint as to what it's making at the moment

More than 1 less than a million

**speedpro** · 3rd December 2009, 17:18

19.2 at revs unknown. No graphs yet.

**speedpro** · 13th December 2009, 18:31

Been busy taking 40mm out of the header pipe. Keen to get it on the dyno before the next meeting as I really would like to check this and the other wobbly pipe. With the slip joint it makes it heaps easier getting it on and off whilst fixing it so it fits properly. Turned out to be a whole lot more work than I thought to shorten the header as I had to redo the whole muffler direction and mounting as it interfered with suspension linkage once I'd cut a bit out. I'm pretty sure i can cut 20mm out of the centre section without having to redo the thing again. I'll make it with a slip joint so I can play with it without too much drama.

**speedpro** · 20th December 2009, 10:11

quote Sonic-V "Any chance you could show the power curve even if against road speed? I am particularly interested to see if you actually have a double hump to your curve which would indicate some sort of recovery. "

This is exactly what I got on the dyno with the first Wobbly pipe as seen in the above post. It had what looked like a normal sort of peak but instead of falling off past that it fell a bit and then peaked again to about 75% of the main peak. Removing 40mm made it worse as well. I wasn't sure which engine Wobbly had designed the pipe for but I think now it was for the old style one which he was pretty scathing about. Pity I didn't build it in time to try on the old one as he reckoned 25hp at the rear wheel.
Anyway . . . . I tried the new laser cut pipe which I've made for the RS chassis with it hanging out the side on the dyno and it made an immediate nearly 2hp increase. The jetting was on the lean side of perfect I think and the timing was a bit advanced, things we had been trying to get the first pipe to work. Not only did the new pipe make more power but it had a good spread as well. We were in a gear which peaked at a bit over 100kmh on the dyno and the power was flat(ish) at peak for 30-40kmh, and the double hump disappeared. It ended up making 20.9hp with more to come I'd say.
The 2nd hump on the first pipe was at horrendous revs, way more than I've tried before. We tried another pipe John had hanging up but the motor didn't want to know. Another old-school pipe that resulted in a lot of crackling in the pipe at it's peak revs.