What is the best way to remove the Speed Limiter on my Hijet. I just got this little rig for some farm work. It has the dump bed and scissor lift feature, so it should be darn handy. I've installed a new water pump, battery and a 2'' lift kit. It seems really sluggish, It starts and runs fine, so I suspect the speed limiter instead of the carb, but I probably should take it off and clean it. Any advise on this speed limiter would be great. Thanks.
I also have a Daihatsu Hijet S80LP. Not sure of the year? It also has a speedometer which also reaches to 25 MPH. Let me know as to what is limiting it's speed? Also, would love to convert vehicle to disk brakes instead of shoes. Would you know of a manufacturer offering such a conversion?
On my Hijet, there is a small black box, underneath the dash on the right hand side of the truck, it has a 4-6 wires leading into it. It is labeled, "speed Limiter". It has a switch that states 15MPH or 25MPH. My Hijet is a Left hand drive, so it was meant for import into the states I assume. I'm very new to these mini trucks, and I'm having a hard time finding info on my particular model. I have not looked at a disc brake conversion yet, but that would be slick. Since these mini trucks use ATV wheels and tires, that's where I would look for parts, such as brake rotors or calipers.
I'm also looking at disk brake conversions for my SL80LP. I can't seem to find too. It you find let me know. I'm also trying to up the speed on mine. Do you have instructions as to how to do?
Hey Robert, on my S80LP there is a fuel cut off solenoid that is on the carburetor. That is what limits mine for speed. once the truck reaches 25mph, the solenoid closes off fuel to the carb. It was the bottom solenoid in the fuel bowl.
SL80LP Modification: I'm also thinking of brake rotors for all 4 wheels vice the OEM drum brakes. I guess use the rotors for a later model Daihatsu HiJet. I'll let you know if successful.
Good Morning! I have the exact same speed limiter under the dash on my S80. Where you able to figure out how to bypass it and boost the speed?
Kraig, Gonna try to weigh in here the best that I can, and I'm hoping that Jigs and Fixtures can weigh in, he's very informative with these issues! First, these posts, start, 11/25/2017 and the last is 5/9/2018! With that in mind, sometimes these guys don't respond, or come back! For whatever life's reasons may be! So, under your dash, is the speed limiter, and also, the little box, where your odometer cable screws into your, transmission! I'm pretty sure that both of these need to be addressed, from past posts! This is where Jig's comes in! to verify and possibly explain,what the heck I'm trying to remember! I use my unit for off road, and I am not interested in removing mine to go faster, but others have, and are! So let's try to figure this out! Limestone
There is a schematic for it in one of my manuals. I’ll have to look for it, so I might be this weekend before I can find it.
I found this wiring diagram yesterday. I have been hunting so many sources, that I have forgotten where I found it. I want to make sure I understand the full process before I start cutting wires.
I think that is intended for a fuel injected model. The carbureted Hijet Off-road versions imported by Daihatsu, used a vibrating needle solenoid system to restrict fuel flow through the main jet. So, if they have one of the left hand drive trucks, they need to bypass that system.
On my '93 S80 the only thing that needed to be done was remove the snap ring in the transfer case to allow it to shift into high range and disconnect the speedometer cable from the little box at the transmission and thread the speedo. cable directly to the trans.. You then need to use a cable tie to hold the disconnected electrical box up out of the way. This effectively removes the speed limiting solenoid from the system. This is the only way I've ever heard of it being done and it still won't be real fast. With 14" RX7 wheels and matching tires it was pretty much wound out at 50 mph. It would probably go a little faster but at 50 mph it was pretty light.
Thank you to everyone who has helped with this. I plan to finish the brake job and reinstall the wheels this weekend. Then I will troubleshoot the speed limit. Jim Nelson - 50mph would be perfect for my small town hardware store truck!
Jim, That's the info That I was remembering from a previous post! Thanks for the input, and refreshing my memory! Limestone
I run into that a lot, trying to remember stuff from 5 or 6 years ago. It usually comes to me in the middle of the nightlife at all. The only reason I remembered this was because I've been there and done that. The ones I still can't remember are the Mitsubishis and I can remember Dan, the Mits, guru explaining it but it's too complicated for my old head to wrap around. The Hi Jet is really pretty simple once you get a little hint or 2.
I found the access panel on the transmission that everyone talks about but there is no e-clip inside. I also removed the speed limiter from under the dash. I probably cannot unplug the speed limiter and call it good. If there is another box I need to address, what does it look like?
I guess the 1st question is does your transfer case shift from low to neutral and high? High is all the way back and on mine is not marked, only markings are L & N. If it will not shift into high then the clip is there and you may need to have someone move the lever back & forth so you can look through that panel and see which shaft the gear is on and the direction the shaft needs to move further to get into high. That will help you locate the clip that you need to remove. It's real easy to drop it into the case and require a fishing trip with a magnet to get it out. There used to be a pic of it in the original thread. The only box I know anything about is on the side of the transmission that the speedo. cable screws into. The wires from that little box go to the solenoid on the carb. and shut off the fuel at That needs to be unscrewed from the tranny and tied up out of the way and the cable screwed directly into the case. I don't know anything about a box under the dash.
I did a google search for "How to get a Daihatsu S80/81 to shift to high range and found a thread from 2/14/08 that had pics of where the clip is.You might try that. The reply was from a poster NWmini. The title of the thread is dif change low to high https://minitrucktalk.com/threads/diff-change-low-to-high.1132/page-4
I only have neutral and drive on the lever behind the shifter. I have confirmed that the neutral position is just that-neutral. I have low gear and first through third gear. I will search for the speed control box you reference but I still think I will need to bypass the daihatsu speed controller. If only I knew 1980s circuit board technology-i could probably rewire it myself.
Well you for sure need to get it to shift in to high, you're right about it only saying D for drive and N for neutral but if you get it to shift into high you will be pleasantly surprised. We have to remember that in order to import these they had to be limited to 25 mph and that little clip on the shaft pretty much did that. I think the solenoid on the carb. was just extra insurance. Before you do too much with the box under the dash get rid of the one on the tranny, that is known to work. Also you should have 4 speeds in your transmission. The only trucks I've seen that limited the shift pattern were Suzukis and they welded a little piece on the top of the trans. that was real easy to remove with a grinder. Never heard of them on Daihatsu's.
Thank you Jim. When I look inside this access panel, I cannot see any room for movement that would expose the elusive e-clip. I will keep searching. I am now on the hunt for the speedo cable box you reference. Does the attached picture look right or am I in the wrong place?
That photo does not look right to me, you have to get under the truck to see where the speedo. cable attaches to the box. The end of the cable is quite a bit bigger than the cable housing and farther down to the left .In you're pic. it looks like someone has tried to take the cable housing apart or maybe it got caught on some brush or something. I'll do a little more digging, the biggest problem is that with the old threads many of the pics just show a ? mark .
WOW - that is hiding in there! The access panel in the bed of the truck makes getting in there tough. I will need a mirror and long need nose plyers.
