Page 5 of 5
Re: Hirobo Zerda refurb
Posted: Sat Feb 17, 2018 3:00 pm
by threesheds
Also found the suspension bars on the front a bit twisted because the shocks are anchored there instead of on the back of the hub. May resort to your solution of changing them over. there's much more abrasion on the underside of this one than yours. Several not so careful owners? I must tidy up those home made shock supports
Re: Hirobo Zerda refurb
Posted: Sat Feb 17, 2018 3:05 pm
by Dadio
With the belt over the tensioner the only downside is the belt not wrapping as far around the drive pulley on the motor so it might slip more than if it was under the tensioner given the same belt tension , in short if you had a hot motor it might be worth getting the right belt , also if you had the clear plastic transmition cover it would not fit with the belt over the top , if it's working that way then you might as well leave it though .
Re: Hirobo Zerda refurb
Posted: Sat Feb 17, 2018 3:12 pm
by threesheds
I see someone's offering a red one for 'only' a thousand bucks from Japan. What to name a new thread 'Zerda: back from the dead' PS I got pinions from motionco. frustratingly the grub screws were different allan key sizes.
Re: Hirobo Zerda refurb
Posted: Sat Feb 17, 2018 3:18 pm
by threesheds
Dadio wrote: ↑Sat Feb 17, 2018 3:05 pm
With the belt over the tensioner the only downside is the belt not wrapping as far around the drive pulley on the motor so it might slip more than if it was under the tensioner given the same belt tension , in short if you had a hot motor it might be worth getting the right belt , also if you had the clear plastic transmition cover it would not fit with the belt over the top , if it's working that way then you might as well leave it though .
agree on all counts but no dust cover (yet). the belts are apparently 93tooth according to printed number on them. when I file out the 18tooth pinion I'll see if it makes a difference. or make a determined effort to check no. of teeth and length of belt and get some replacements. I think you said yours were 93teeth also?
Re: Hirobo Zerda refurb
Posted: Sat Feb 17, 2018 3:29 pm
by Dadio
The 93 tooth belt is for the 18 tooth pinion yes , I like the new steering servo position and if you have a metal geared servo then you can probably get away without a servo saver .
I'm trying to think what you could make the cage section out of , it's quite an odd S bend around the shocks , a soft aluminium or nylon rod and heat it to bend it , it's got to be fairly strong and flexible
Re: Hirobo Zerda refurb
Posted: Sun Jun 24, 2018 7:16 pm
by Wjb
I got new belts from tough racing korea anyone used these?
And how much power can you run before you get belt issues? 17.5 turn brushless ok?
Obviously the zerda hasn't a slipper clutch anyone fitted one?
Re: Hirobo Zerda refurb
Posted: Mon Jun 25, 2018 1:49 am
by Dadio
I ordered the hot racing belts , the main belt is fine but the small one is the wrong size . I have a 10.5 BL in mine at the moment and get excessive belt slip so 13.5- 17.5 is probably better .
Re: Hirobo Zerda refurb
Posted: Tue Jul 03, 2018 1:43 am
by Wjb
Cheers mate. I was only going to run 17.5 bs max any way
Re: Hirobo Zerda refurb
Posted: Tue Jul 03, 2018 2:06 am
by Dadio
Oh one thing to look at before buying is the position of the wires on the motor can , the Zerda gearbox has a support ring for the rear of the motor and this fouls on the wires of most motors with wires on the side of the can , you need a motor with wires coming out of the end of the can .
Re: Hirobo Zerda refurb
Posted: Mon Apr 20, 2020 3:01 pm
by Dadio
Just thought I'd put these here as well , i model'd up the rear frame part and the frame cross link parts , both going on Thingiverse .
Re: Hirobo Zerda refurb
Posted: Tue Sep 15, 2020 3:26 am
by threesheds
Browsing thru this forum over a morning cuppa I wonder why there's no Hirobo section. There's lots of posts all over the place going back 10 years and more
Re: Hirobo Zerda refurb
Posted: Tue Sep 15, 2020 10:02 am
by threesheds
If you 3d any zerda front arms keep me in mind for a pair. Since I sussed the ct1 zr1 part difference the zerda front arms might be the new hen's teeth of RC.
Plenty of ct1s around it seems. Only for spares and insurance.
Re: Hirobo Zerda refurb
Posted: Sun Oct 11, 2020 1:02 pm
by threesheds
I got a pair of zr1 on eBay. The seller put a typo in the description so the listing didn't come up as hirobo. That might have kept the bids away. About £7 with a rockn city castor hub holder as well.
Re: Hirobo Zerda refurb
Posted: Wed Dec 23, 2020 8:11 pm
by RC10superfan
I remember the Hirobo Zerda from races in the mid 1980s. It was a very cool 4wd and whisper quiet with its belt drive. It will be a great vintage rebuild!