Triumphrat

NORTY FLATZ

Did you dyno your bike before the change? If so, what, where are the increases? Also, did your bike throw any codes?
Reduction in fuel range?

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megalo

i'm sorry for my bad english, i mean that the stock 2010 engine make more hp than the 2009, lcd odometer has hc pistons and according to the service manual it make more hp:

790 bonneville 62 hp / 60 nm
865 bonneville carbs 64 hp / 68 nm
865 bonneville efi 66,1 hp / 67,8 nm
865 efi with lcd odo 68,1 hp / 68,4 nm

when i was an injected i have a bad map just because i don't have a dyno near where i live, now with carb the bike run much more better and i noticed a reduction in fuel range

megalo

i've bought everything used, the hardest part to find was the flywheel that i've paid 200 euros

XeNoMoRpH

A valid argument, but what if I went with a non-stock EFI system tuned properly? I don't think the non-stock carburetors would have a chance.


You had a bad map? Was this from your own doing?

mikeinva

That is the trouble at this time no one has come up with a non-stock efi system that works as good as the non stock carb system for these bikes yet.Some one will in time im sure but it will cost big $$$ and may not make any more hp .The up to date flat slide carbs will be hard to beat at high rpm.
That is where everyone that has tried to build the motors on these bikes with efi has failed to match the carb bikes.I think someone will come up with a efi system that will run with full modded carb motors on these bikes but I think you will have to change most of the system to do so.To make these motors run with big bore /stroker kits you need more air flow then most of the sport bikes have 2 big piston that have to feeed through 2 throttle boddies not 3 or 4 smaller pistons that feed through 3 or 4 throttle bodies.takes alot more air for a 100hp twin then it does for a 100hp triple or 4 banger per bore.triumph did not design the efi systems on these bikes for that kind of air flow they didnt plan on any of us takeing these motors to that high of hp.There system works great on near stock bikes that it was designed to handle.What would one need to get the efi up to do the job?throttle boddies ,injectors ,maybe fuel pump and maybe even a better ecu.That will add up to about 3 times the cost of flat slide carbs maybe $3000 to $4000 add that to the cost of building the motor and things get crazy.

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nicholas900

Nice job bro! I love the front facing picture. Looks so nice without the guages sticking up. I want to get rid of my guages and use two small digital guages mounted in a BC top yoke. But it seems hard to do on efi bike.

Don't think I'd go that far myself. But cool none the less.

ThruxOZ

Just wondering could you have just converted your EFI bike to fcr carbies by only fitting carbies. Fitting fuel reg rated at 6psi?
Leaving the EFI ecu to control just the timing?

Forchetto

I think he's left a few items off his conversion list on post 5, minor details such as a carbed bike's fuel tank (one of the pictures shows a gas tap, not present on an EFI tank), then he would have needed an igniter and the EFI ECU binned. This is because the nature of the ignition signals for EFI are different from the carbed bike, so he couldn't use the original ECU.

Altogether, I can't see all this trouble and expense as worthwhile myself...

So now we have:

Fuel tank
Flywheel
Main wiring harness
Carbs
Ignition coil
Igniter unit

triplestrength

Why not buy pre EFI bike and mod that surely more cost effective.
Must be a few low mileage one's out there.
I still struggle to believe that carbs would produce more useful power.
But each to their own.

Sent from my GT-I9100P using Motorcycle.com Free App

Baltobonneville

I was wondering the same thing.

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Marty
2005 Bonneville Blue 790cc, AI removed, Staintunes RC, Uni filter, no snorkel, 118/40/NBZT "Thruxton" needles/1 shim/3 turns, tachometer, Ikon 7610s, Ricor Intiminators, Dunlop GT501s, D9 gauge panel.