Bimota Forum

JohnnyCecotto · Joined: 05 Aug 2013 Posts: 19

Anybody know how to get a YB9 SRI to run in our damp UK climate??!!!

I think there is a potentiometer fix??

Cheers!

laminator · Joined: 27 Oct 2007 Posts: 320 Location: Midlands

Sorry can't help as mines an SR, but hope you can sort it as they are great bikes for a good thrash.
_________________
Bimotas, Yamaha FZR 2TK, Honda NC30, MV Agusta F3 800, Aprilia RS250

Evilchicken0 · Joined: 12 May 2010 Posts: 2996 Location: London

sell it ... I can run to a mars bar and belly button fluff ...

Take it to a dyno, I know its really the cheapest solution but you need some test equipment to find the problem.
_________________
Don't read everything you believe

GeeKay · Joined: 29 May 2009 Posts: 1767 Location: West Yorkshire

Throw the injection system in the bin and fit a set of carbs Wink

_________________
Bimota SB6 and Benelli TNT 899S road bikes.
Beta Techno trials iron. Project bikes:- Suzuki V4 500, TS185 cafe racer, XR11/71, Kettle/Katana, TDRGV250, OR50, Gag125,Triumph T595 and a Triumph X75 Hurricane replica.
Too many projects...............

vort28 · Joined: 22 Mar 2010 Posts: 2194 Location: Northwest , UK

I nearly bought one from NLM when they were the ' importers ' some years ago, well that was till I rode it , BUT they did say they had alternative maps for the ecu , so maybe try talking to them and see what they say.
Although I did question WHY they had not put this far superior map on the bike I rode when they knew I was coming to test it !!????!! , So don't believe everything they say , but might help.

Evilchicken0 · Joined: 12 May 2010 Posts: 2996 Location: London

You'd fit a Power Commander or Bazzaz unit to it so you can tune it at a later date. You could probably reprogram the ecu but it would probably work out much more expensive.

The SRi used the ThunderCat engine, whereas the earlier ones hand the Foxeye, so the barrels are nikasil coated
_________________
Don't read everything you believe

JohnnyCecotto · Joined: 05 Aug 2013 Posts: 19

Ok thanks, maybe carb mod would be easiest fix?

Evilchicken0 · Joined: 12 May 2010 Posts: 2996 Location: London

Mike Jennings · Joined: 22 Mar 2008 Posts: 286 Location: England

Hello,

you could try K&Ns on the Thundercat carbs to avoid using the airbox. I don't know how useful the airbox plenum is on these bikes but back when the SRi was designed they hadn't sorted the technology too well (which explains the SRi and the SB6 fuelling problems?).

Cheers, MikeJ

P.S. the FZR and Thundercat used different cylinder spacings, so the carb (and exhaust) spacings are different. Also, if I remember correctly, the late model FZRs were called Thundercats in some markets, just to confuse the issue, so check what you're buying.

Evilchicken0 · Joined: 12 May 2010 Posts: 2996 Location: London

JohnnyCecotto · Joined: 05 Aug 2013 Posts: 19

Thanks again

Mike Jennings · Joined: 22 Mar 2008 Posts: 286 Location: England

Hello,

I ran a Thundercat engine in an SR frame for a racer project about eight years ago. It ran well with K&Ns and an R1 silencer but as Evil says, you need the Thundercat wiring loom for the TPS. I seem to remember that the cylinder spacings were different from the SR as I had to use a cheapo Far Eastern exhaust pipe set for the project.

The SB7 uses FI but the Sb6 uses carbs and the airbox can be a bit of a pain on them. On the other hand, using K&Ns on the SB6 can lead to flat spots as well so it's a bit of swings and roundabouts.

Cheers, MikeJ

P.S A hopped-up FZR400 sounds fun!

Evilchicken0 · Joined: 12 May 2010 Posts: 2996 Location: London

If I finally finish the 400's. I've got 2 engines, an ex sidecar race unit and one that I've stroked to 660 using 3he crank and fazer rods
Odd about the pipe
_________________
Don't read everything you believe