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Showing posts from January, 2018

HRC Throttle bodies

I have been after one of these for a while and do not appear to appear very often.

If you compare both the kit version, they are near identical. HRC describe the changes as supporting engine braking. It appears though that this is only supported by the HRC kit ECU. 

They say:

Replace the throttle body with the racing kit. 

NOTE: • The 2008 CBR1000RR is equipped with IACV (Idle Air Control Valve). Fundamentally IACV controls the air volume under the low engine speed range. But the throttle body of the racing kit, IACV controls the air volume under all engine speed range to optimize the throttle control. This intends to reduce the engine brake feeling under high engine speed. • Please use the HRC kit PGM-FI/IGN unit for the throttle body of the racing kit.

Along the way, found that there are two versions of the Throttle Bodies:

16400-MFL-R10 (08-09 model) GQ23DA MARKINGS 
16400-MFL-R11 (10-14 model) GQ23EA MARKINGS

The standard throttle body usually has a marking GQ23AA