Personally, I would switch to plastic. Either stock or RPM. The a-arms tend to be a spot where aluminum is not a benefit, doesn't absorb the impacts well.
Did you use the Tekno dogbones as well? Looks like a nice setup.
If you get a moment, maybe post this mod up in its own thread in the chassis and drivetrain section. That way more people can easily find it.
Depends on how much you want to spend. Currently, there is a whole carb on ebay.
https://www.ebay.com/itm/HPI-15260-SLIDE-CARBURETOR-COMPLETE-TYPE-KA-COMPOSITE-ENGINE-CARB-NEW/173323052348?epid=1200356133&hash=item285adbe53c:g:WnQAAOSw441a~dp8
It really is too bad @Larsenracing isn't around anymore. I waited to long to get around to trying to buy his stuff.
Seems I have a knack for that though, waited to long on my conversion stuff from Kershaw as well.
:banghead: :argh:
What remote are you using? Stock, unfortunately, I believe does not have this but there are remotes out there that have a Throttle Dual Rate setting. You can dial down the throttle substantially with that.
Are you stock for the spur? I think it's a 49 tooth. Personally, I'd gear up a little since your new engine will have a bit more torque. I'd recommend grabbing the Robinson Racing 16/48 combo.
https://www.amazon.com/Robinson-Racing-Products-Steel-Combo/dp/B000BOK42E
What shocks do you presently have?
People seem to be fairly happy with the HPI big bores and there are lots of customization parts out there.
https://www.amazon.com/HPI-Racing-A720-Aluminum-Shock/dp/B0013B2BM0
Did you actually flip the switch to the opposite direction and check if it helped? Sometimes "reverse" on the switch ends up being normal for driving due to other things, like the Receiver and ESC.
Also make sure all chassis components appear to be sitting correctly and that there are no cracks. No amount of good meshing will save you if the chassis is tweaked.
Ask any questions you have!
Looks to me that both transmissions are similarly set up, but they do use different components to do the job.
X transmission (pages 46-47)
https://www.hpiracing.com/assets/documents/instruction_manuals/12861_savage_x_ss_glb_m_v1.pdf
25 transmission (page 60)...