LCGB Forums

by **Captain Pugwash** » Wed Dec 02, 2015 10:32 pm

Dimitrios, I'm looking forward to the finished build 8-)

by **Dimitrios_231** » Wed Dec 02, 2015 10:44 pm

I hope it won't go bang at the first ride,a 252.25cc Rapido can never be famous for reliability :lol:

I forgot to say that I'll run it with a single piston ring :shock:

Excuse me,the conrod is 110mm not 100mm

by **Warkton Tornado No.1** » Thu Dec 03, 2015 3:00 am

It would be good if you could let us see a video of the first start up.

I can't help wonder if you are likely to encounter heat issues with the tailpipe size. Perhaps I've misunderstood, but if it is only Ø20 mm bore, I doubt that's adequate for the rest of your set-up.

God Luck with it though!

by **Dimitrios_231** » Thu Dec 03, 2015 2:45 pm

I trust Mr.Gori for his tailpipe diameter decisions

Earlier I matched the u-bend to the cylinder.

I took again measurements from this u-bend.

U-bend max diameter : O/D 55.20mm I/D 52.50mm
Tailpipe diameter : O/D 22.20mm I/D 19.85mm

Main Box entry diameter : O/D 58.50mm I/D 55.60mm

by **Warkton Tornado No.1** » Thu Dec 03, 2015 9:51 pm

Everything depends upon the state of tune & your riding style. My conscience is relieved that I've made you aware.

I'm fairly certain that sustained flat out riding with something that should deliver 25 plus bhp @ the back wheel would result in a build up of heat on a bleed anything less than Ø 25 mm (especially using pump fuel rather than Avgas) if I were to ride it as precisely that occured before I learnt my lesson. It was Ø 22 mm to be precise, based upon calculations, of course!

by **Dimitrios_231** » Thu Dec 03, 2015 10:18 pm

Thank you for the valuable input

If something goes wrong,I have a spare 72.5mm piston,I'll cut the exhaust, open it and fabricate a larger diameter tailpipe.

Engine is on the frame now.

by **Dimitrios_231** » Sun Dec 06, 2015 1:05 pm

Still waiting for Tino's special part.
I couldn't wait,checked spark.
OK

by **Dimitrios_231** » Sun Dec 06, 2015 8:05 pm

Few gentle first run revs,
I run it without the tailpipe endcan,I don't like the look of it,I'll keep it only for the MOT.

by **Dimitrios_231** » Sat Dec 12, 2015 3:05 pm

Testing week,
love the noise,I mean the sound

need to fine adjust carb jetting.

by **dickie** » Fri Feb 19, 2016 8:10 am

So what's it like on the road dimitrios?

I'm really interested in the gp50 for my ts1.

by **Dimitrios_231** » Fri Feb 19, 2016 10:47 am

I'm happy with it,
can't compare it with another exhaust as I had done extra work on the cylinder plus I changed the gearing (to shorter) before I use the GP50.

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