Manky Monkey Motors

Technical Section => Trike Tech => Topic started by: mouse on October 24, 2007, 05:18:40 PM



Title: manky monkey :-)
Post by: mouse on October 24, 2007, 05:18:40 PM
hey up m8
would 40mm OD ERW tube be to big to use for my new trike build ?? Its the same type of tube you use just bigger diameter
the reason i ask is i have loads of it lol


Title: Re: manky monkey :-)
Post by: VALLEYSBOY on October 24, 2007, 07:32:13 PM
!!!lol where do you live :D


Title: Re: manky monkey :-)
Post by: mouse on October 24, 2007, 08:25:10 PM
hey up m8
i live 7 miles north of leicester  ;D


Title: Re: manky monkey :-)
Post by: Manky Monkey on October 24, 2007, 09:48:26 PM
Hiya Mouse,
What's 40mm in real money? We use 1 inch bore for the main frame & 1 1/2 inch for the top tube, (both with 4mm wall thickness -yeah, I know I'm mixing Imperial & Metric, but Metric was only just starting to be taught when I was at school so I tend to work in whatever's nearest to the measurement I need!
I've thought of doing a trike frame in the 1 1/2 bore tube & wondered if it'd look O.K or too chunky. Not sure. Would be O.K if you were using a bigger car engine, but maybe a little overpowering for a little Reliant. I dunno. Why not try it & see! Don't forget though that being a bigger diameter tube, you won't be able to create as tight bends as you can in smaller tube, so may have to leave more room around the engine for example.
When I did my first trike frame most people were still building them in bike sized tube, which looked very spindly on trikes. Going up to the 1 inch tube kept things in proportion. If you've got loads of 1 1/2 inch, bend a couple of bits & see what it looks like compared to your engine, axle, front end etc. You might find you have to fit chunkier looking forks & yokes or a bigger tank or whatever to keep things properly proportioned.


Title: Re: manky monkey :-)
Post by: mouse on October 25, 2007, 08:33:02 AM
Hey up m8
thanks for all that info very helpful
and I'm pleased to meet a guy who uses the same measurement as me the proper one lol imperial yeah  ;D
40mm equates to just over 1 1/2 inch if i got me sums right  ;D
my engine for the new trike is a ntv 650 so chunky frame ain't gonna look right.So thanks for pointing that out.I have the forks made up I'm using gpz900 stanchions with klr600 tubes and guzzi yokes all polished up.Next question  ;Dim toying with using a jag axle xj6 ish inboard disc one
.Do you or anybody else know if it will work with the ntv650 engine? IE direction/ratio?


Title: Re: manky monkey :-)
Post by: Manky Monkey on October 25, 2007, 03:25:13 PM
No idea. You could try Wynne at JW Motorcycles, (his link's on the main website Links Page. Yoda built his site for him). He builds trikes commercially. Or failing that, you could ask Yoda, behind the scenes webmaster of this 'ere site as well. His BMW bike engined trike's got a Jag back axle. Or ask Desperate Dan, trike builder extraordinare, (his link's on the Links Page too & Yoda built his site for him too!).


Title: Re: manky monkey :-)
Post by: mouse on October 25, 2007, 03:50:47 PM
oh cheers for that m8 i know yoda im a member of his site :-) i didnt know his trike had a jag back end im off now to go and pester him lol


Title: Re: manky monkey :-)
Post by: Manky Monkey on October 25, 2007, 04:08:30 PM
Ask him if the axle's still painted PINK!


Title: Re: manky monkey :-)
Post by: VALLEYSBOY on October 25, 2007, 08:51:54 PM
nice trike that Yoda's? how'd he get them yokes through mvsa/sva thingy as they look pretty pointy to me :)


Title: Re: manky monkey :-)
Post by: Manky Monkey on October 25, 2007, 09:46:05 PM
Yup, the Yodiemobile.
His yokes were inspired by Vic Jefford's show bikes. Disability exemption -disabled trikes don't have to be MSVA'd.
Could be the way for you to go mate? Check the top item of the Motors, 3 Wheels, Tech bit:

http://www.mankymonkeymotors.co.uk/trikes.htm


Title: Re: manky monkey :-)
Post by: VALLEYSBOY on October 25, 2007, 11:13:16 PM
yup :) looks that way :) will have to search out some of Sooze's threads again.