TRF511 + Vector X12 - Pinion doesn't reach Spur?

[djmcnz]

Hi all,

Am building my TRF511 and have a new X12 to install. It's obvious that the pinion wont reach the spur gear when install properly on the motor shaft... it's perhaps 5mm or 6mm short. Motor shaft is typical length.

Is it a property of this chassis design that long pinions are required? The kit pinion is long enough to reach but it's a big pinion.

Do I need to shelf my existing pinions and get special longer ones for this kit? If so, any recommendations? Am currently using RR hardened pinions.

Thanks in anticipation!

[Dyna]

The dedicated Tamiya pinions are the ones to use - some other makes do fit fine ( best search old threads, there has been posts on this problem before ) but the Tamiya's are readily available, have numerous sizes and fit perfect

[djmcnz]

Thanks Dyna.

So anybody else make suitable pinions or just Tamiya?

[MHeadling]

HPI and Corally make medium and long boss pinons, AMC would be worth a look for Corally ones, have a look on HPI website for pinions and go to the shop finder to find your local shop

[djmcnz]

Thanks guys, apprecaite your assistance.

[djmcnz]

Lol, back again...

So, the my 511/X12 8.5T combo wants a 27 tooth pinion as per the calculation below and I can't find a Tamiya 48p one. I'd like a hard steel one, does anybody have a Tamiya part number for this (ideally a 26/27 combo pack). Obviously in line with the advice above it needs to be a long one.

X12 8.5T 4WD Off-Road LRP Recommendation = 7.0:1
TRF511 Gear Ratio (91T Spur / 27T Pinion x 2.06) = 6.94:1

Thanks...