Heavy Duty spurgear - parts needed

[tert]

Hi!

I want to replace my crappy plastic spurgear to a metal one but I am a bit pussled what parts I need. I was looking at a HPI tutorial page and in this page they state that you need a complete set of parts (HPI 86807)

However I did find these parts locally in Sweden. Will they bolt on directly onto my Savage or do I need any other parts (for example the purple thing to the spurgear as comes with the HPI 86807 set as per above?

http://stockholm.reservdelsrc.com/product/heavy-duty-spur-gear-52-tooth
http://stockholm.reservdelsrc.com/product/racing-clutch-bell-16-tooth-1m

 

[SavageDarwin]

I did this upgrade when my slipper got embedded into the plastic spur. You will need a new slipper clutch pad for your new spur gear. I used this time to also upgrade to the ceramic hd slipper clutch

 

[SavageDarwin]

As far as the hpi kit you mentioned, the purple part is part of the spurr (makes spurr lighter for racing it (aluminum)) the one u linked is solid and no need for the purple center

 

[tert]

Thanks!

 

[olds97_lss]

The bell is hardened steel. Standard bells are not and a steel spur will tear the teeth off them in short order even if shimmed properly. So, if you buy a different bell later, make sure it's HD or "racing" as HPI coined it. Other companies make it easier and just call them "hardened" vs not.

This was a standard bell used with a drill steel (hardened) spur:

Lasted about 1 tank on my big block t-maxx at the time.

I have the 47T version on my X with a 17T HPI bell:
https://www.hpiracing.com/en/part/77127
https://www.hpiracing.com/en/part/77107

 

[tert]

Yes, it is very important to make sure that you have a HD pinion if using a steel spur.

I have now been using the steel spur (47) and HD clutch bell (16) for a gallon and it works like a charm. Feels so assuring to have this instead of the plastic.