Honda CRF450R Throttlebody on 570.

ALARKA · Oct 5, 2015

tourist said:
I hope it's not too off-topicy - What would you ballpark a good throttlebody size for a "stock plus" motor? I.e. most things stock, just opened up a bit, e.g. exhaust / airbox, basic mapping?

FWIW I had my stock TB bored to 45mm by Injectioneering - Privacy Policy
Also
Maxbore.com throttle body boring service and repair

If fp-engineering had a US dealer then that's what I would've done but after the VAT tax & shipping it was a bit much for me

tourist · Oct 6, 2015

ALARKA said:
FWIW I had my stock TB bored to 45mm by Injectioneering - Privacy Policy
Also
Maxbore.com throttle body boring service and repair

If fp-engineering had a US dealer then that's what I would've done but after the VAT tax & shipping it was a bit much for me

lovely! How is the result to drive? And what do you do for fueling control?

and thanks TomTom, great to hear that ithe Bazzaz works well. Been pointing people towards it tentatively after 1lunger (iirc) was happy with it and described his experience over on advrider. good to get further confirmation that people aren't being directed into a pit of despair

TomTom · Oct 6, 2015

Got it off of fleabay, clean deal and and priced well too, around €220.
Did use it mapping the bike in the dyno and although it was a bit different to what Im used to it worked well and felt logical.
For the price its five out of five for me, not at all affiliated.

Just said goodbye to my injector and the TPS for a while, on their way to former east germany now.

The guy who leant me the 50 honda TB is pretty nifty, I dynoed his 490ed kx last wednesday and yesterday he let me know the TB is now on his bike with a custom inlet rubber and all, crafty people is king! divorse rate not discussed

Honda CRF450R Throttlebody on 570.

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