1234 "5" once i caught a fish alive

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greasy-fingers
Posts: 538
Joined: Thu Jan 07, 2010 11:36 pm

1234 "5" once i caught a fish alive

Post by greasy-fingers » Sat Apr 04, 2020 7:00 pm

91595463_10219162494485111_6934323075617914880_o.jpg
91595463_10219162494485111_6934323075617914880_o.jpg (200.74 KiB) Viewed 2107 times

arthur lewthwaite
Posts: 682
Joined: Fri Dec 28, 2012 7:03 pm

Re: 1234 "5" once i caught a fish alive

Post by arthur lewthwaite » Sat Apr 04, 2020 8:47 pm

am looking at using 250 mz 5 speed gear box parts when i carry on making my four cylinder engine,was put on hold whilst i wated for operation on my neck at christmas,nearly wound up not walking anduse of y left arm and hands due to disc squashing spinal cord,but a lot better now, but about 75 per cent ok.

formic
Posts: 208
Joined: Fri Jan 08, 2010 3:52 pm

Re: 1234 "5" once i caught a fish alive

Post by formic » Sun Apr 05, 2020 10:02 am

Very nice Graham.
I have enough trouble selecting the ones I already have.
Good luck with this F******** virus.
Michael

greasy-fingers
Posts: 538
Joined: Thu Jan 07, 2010 11:36 pm

Re: 1234 "5" once i caught a fish alive

Post by greasy-fingers » Sun Apr 05, 2020 11:39 am

this is taken from the ex rex caunt 18.1bhp "at the rear wheel" rumi engine that I have owned for many years, it proved too be a bit radical for road use in its original shorter stroke / very revvy format, with a very clever engineering friend it is being re-worked to use standard stroke crankshaft and milder porting , this requires modifying a new crankcase to accept rex,s "Yamaha close ratio 5 speed yas1" gear box and all its cleverly worked out fitting and selection modifications, as there where just too many mods on rex,s crankcase to accept a normal "caged big and little end" crankshaft. hopefully the end result will make for a very usable road engine.

hugomez
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Re: 1234 "5" once i caught a fish alive

Post by hugomez » Mon Apr 06, 2020 10:36 am

Very interesting Graham!!!!
Thanks for sharing it with us :)
Hugo
My little Formichino here: http://www.formichino.com/pictures1.html

arthur lewthwaite
Posts: 682
Joined: Fri Dec 28, 2012 7:03 pm

Re: 1234 "5" once i caught a fish alive

Post by arthur lewthwaite » Fri Apr 10, 2020 10:59 am

one of he reasons i was looking at the MZ 5 speed box is that it uses a selector drum the same as a moto rumi does and also I can make shafts to suit as the gear sets are a touch narrower than moto rumis.also the 4 cylinder will be 250 cc the same as the mz.

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