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RB20
Posted: Mon Apr 20, 2009 9:40 pm
by bazman
Anyone running one and give me some feedback?
Going to build one , also will 4 plate clutch stand up to the power, and what carb 30 mm delly flatslide or mikuni 30mm (do these fit under panels?
Cheers Baz.
P.s notice Dan's selling kit etc , pm me if you want to do a deal for complete top end ,crank, carb etc

Re: RB20
Posted: Mon Apr 20, 2009 10:07 pm
by carlos fandango
Hi Bazmzn
Im running an rb20 with a 30mm phbh, jl3, and four plate std.clutch extra stong springs.
Ive done 800 miles so far and the clutch is holding up, but recently found it slipping a little, under pressure

so i will change to a five plate in the future.
The phbh was used because that was what i had at the time, however i now have a tmx35 but i havent got the correct jets yet so havent fitted it.

The kit comes with the same manifold as the rb22 and rb25 so they are to suit the larger carb, if you want to fit a 30mm you will need a stepped rubber (you can buy a vw rubber off epay which fits, 2 for about £4

).
Ive managed 78mph (gps) so far
Regards
Russell
Re: RB20
Posted: Tue Apr 21, 2009 7:52 am
by bazman
Good to hear that Russel , how do you find the engine ie smooth....powerful etc?
Cheers for the reply

Re: RB20
Posted: Tue Apr 21, 2009 11:27 pm
by carlos fandango
Hi Bazman
Yes it a nice ride could do with a bit more torque though
Missed the bit about the panels, the phbh fits under gp panels just one side rubs on the panel a little. the tmx 35mm does fit under with about 15mm clearance at the tightest point
with the phbh on its doing about 75 miles to a standard tank.
Re: RB20
Posted: Wed Apr 22, 2009 7:28 am
by bazman
Wow 75 miles to a standard tank , that's bloody good, was thinking of a bigger tank myself, i take it that's not full throttle driving though

Re: RB20
Posted: Wed Apr 22, 2009 9:24 am
by carlos fandango
Not full throttle but a mix of normal driving and blasting. At full throttle would be about 50 miles. think it will be less with the tmx though
Re: RB20
Posted: Thu Apr 23, 2009 3:28 pm
by damdam
carlos what kind of gearbox are you using on your RB20 ?
Thanx
Dam
Re: RB20
Posted: Thu Apr 23, 2009 5:38 pm
by carlos fandango
Hi damdam
Ive got gp150 18/47, gaps a bit big between 3 and 4 but not two bad if you open it up
Tried a li150 in first 15/46 but didnt like it.going to try a gp200 when i get one.
Re: RB20
Posted: Thu Apr 23, 2009 8:40 pm
by paulmgreen
[quote="carlos fandango" if you want to fit a 30mm you will need a stepped rubber (you can buy a vw rubber off epay which fits, 2 for about £4

).
Ive managed 78mph (gps) so far
Regards
Russell[/quote]
What VW rubber are you talking about here? do you have any links?
Re: RB20
Posted: Thu Apr 23, 2009 9:11 pm
by bazman
I can see your going to be busy with questions Russel so i'll ask another as well
I'm building a rb 20 on gp 150 engine as well , is the gear box really bad or as you say give it some and fine !!! Notice your ratio is 4.80, maybe worth a change to around the 5.0 ?
Chers fella Baz
