The wall of coolness

**Padmei** · 8th November 2010, 07:11

Wow he's hot Jatz. I've some extra posters of Justin Beeber if you want some

**NordieBoy** · 8th November 2010, 09:57

Go the micro Dakar bikes

**Underground** · 9th November 2010, 09:51

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**Crim** · 9th November 2010, 10:51

Originally Posted by Underground

now that is one cool machine.................. any cooler and it would be right at the ice cold end of the wall with the KLRs!

**clint640** · 9th November 2010, 11:07

Originally Posted by XF650

http://www.trademe.co.nz/Trade-Me-Mo...-330291545.htm

Anyone ridden one?

I used to own one in 1994. Looked damn cool & more fun than a fistful of firecrackers

But coming off a CG125 anything was gunna be better! it I never really liked the way it handled on gravel, felt a bit top heavy, but I only ever had road tyres on it & I couldn't ride for shit on gravel then anyway. On twisty tarseal it was glorious, heaps of grunt for a 250, delivered nicely via the YPVS, good brakes, real easy to ride fast through corners. Not so flash for touring, 130km ish tank range & by that stage your arse needed a break from the seat anyway.

The TZR based engines were apparently a total handgrenade though, mine lunched itself 2 weeks after I sold it.

Cheers
Clint

**Padmei** · 15th November 2010, 19:15

Puch twingle - amazing. SIngle two stroke with two pistons sharing common combustion chamber. Rear piston handles intake & front piston exhaust. Conrods piggybacked off crank.

Great fuel efficiency however couldn't rev out that well.

**Eddieb** · 15th November 2010, 20:06

Originally Posted by Padmei

Puch twingle - amazing. SIngle two stroke with two pistons sharing common combustion chamber. Rear piston handles intake & front piston exhaust. Conrods piggybacked off crank.

Great fuel efficiency however couldn't rev out that well.

Wow, so the pistons move up and down together or alternately? I presume it would have to be together.

**Woodman** · 15th November 2010, 20:11

Originally Posted by Eddieb

Wow, so the pistons move up and down together or alternately? I presume it would have to be together.

Check out the angles of the conrods, they reach tdc at different times so are slightly offset.

Furiously trying to figure out how this works.

**Padmei** · 15th November 2010, 21:25

Originally Posted by Woodman

Check out the angles of the conrods, they reach tdc at different times so are slightly offset.

Furiously trying to figure out how this works.

I don't think they do. I think they reach TDC at the same time & some trickery is done at the crank.

Some are twin sparked as well. Check them out on Wiki.