KTMspeedFreak

Hey all, so i’m in the process of an engine swap and thought it may be a good time to let everyone know I am going to sell the beloved Modded 800cc 😢 Those who subscribe to the youtube channel know what a beast this engine has become! Those that don’t here it is... Drop in Suzuki F8B with closed diff tranny. Engine only had 50hrs total. This is the carbureted version that Joyner used in its 2006 Mini/Sand Vipers. Engine is easily 2x more powerful than a stock F8B. This is the little grenade that’s had my buggy going over 70mph as seen on youtube. Heres why it’s so powerful- Custom ground camshaft from American Custom Cams. Shaved Head higher compression with 030” clearance. Weber 32/36 carb jetted for sea level. Full stage 3 ported and polished head with enlarged oil ports. Performance valve job. Custom build headers. If you’d like to see and hear this baby in action checkout my channel https://m.youtube.com/c/dirtgeartv

Are the joyner axles the same diameter of some donor car axles? My concern was they wouldn’t be the same. Also what do you mean by “overlapping” them? I am very comfortable mig welding and pre heating, i’m hoping tig wouldn’t be necessary...

Hey all, some of you know i’m currently working on an engine swap for my 800cc (non brand). For argument sake it’s identical to the older (2006) sand viper in parts. For those who have done an engine swap I could really use your help are you using whole donor vehicle axles or are you cutting and connecting the donor vehicle axles to the Joyner axles via sleeves? If I use the donor vehicle axles they would be stronger but then I’m having to replace hubs, bearing and probably knuckles brakes etc. So i’m considering welding the donors to the joyner’s so I do not have to replace everything, but i’m not sure if they would be strong enough. Any feedback is greatly appreciated!

Well y'all are getting the updates even before I publish on YT! A lot left to do but I will say the test fit was a success. Im going to have to figure out how to fab my own engine mounts since the mirage mounts are crazy expensive, Like $1000. So I'm trying to find a way to adapt my current F8B mounts to bold onto the aluminum block of the Mirage. More updates to follow... Or you could always just sub me too 🙂

Yes it’s Mitsubishi 1.2L While we’re discussing engine swaps, I really need some help from anyone that’s done any sort of engine swaps Geo or other. My MAIN concern is going to be the final gearing ratios. I’d hate to put all the time and money into this build to find out the final gearing is useless. Does anyone know how well a manual car tranny will preform on a swap like Geo or other small engine? 1st gear in the tranny I have will be appx 3.5 2nd is 1.9 etc... with a final drive of 4.05. It’s reasonable low for a street car but of course I’m not driving on street and on east coast I need a nice low gear ratio for slow trails...

Guess what I picked up today fellas... FYI if anyone would like to keep up on this build series you can follow my youtube channel https://m.youtube.com/c/dirtgeartv

It’s funny you ask because I was just pricing engines and trannys on this the other day, unfortunately work has had me crazy busy lately. The thing that’s stoping me from pulling the trigger isn’t cost weight or creating the custom engine mounts but actually figuring out all the small computerized details of mounting a modern engine without a full donor vehicle, like ECU, ignition, wiring, and fuel injection. So if anyone had any tips on how that all can be done simply without a full donor at my disposal i’m all ears 😆

The geo is not a bad option, but it’s going to be heavier than the mirage for same or less power numbers. If I needed an engine/tranny combo i’d look no further than the mirage, going to be the lightest most powerful combo you’ll find for cheap cheap cheap. Keep us posted!

Thanks! Yes a snap ring is exactly what holds this coupler on the output shaft. Since I didn’t know where to order this ring, I found a piece of rounded steel wire that I cut to shape and size and bent it to fit just so in the groove. So far it has held together after a test run.

I took some pics... As you can see the right side axle/cup/hub whatever you call it is able to move side by side and when it moves all my fluid dumps out. The other side I cannot get to move whatsoever so I feel like this isn’t suppose to be happening and perhaps a nut/clip or some other restraint is suppose to hold this in place?? anyone know how these work or what might be missing?

Well so yes I discovered the problem. One side axle has about 1/1.5” side to side play. So i can pull the axle right out of the seal with no effort at all. I’m just guessing here but shouldn’t there be something that holds the axle in place to keep it from just sliding off and out of its seal?

Thx, I’ve tried doesn’t respond. offered to buy it well over the asking price too... oh well

I’ve been searching for months for headers for my 800cc no luck. Local shop wants $600 to build a header 😡 I found an add selling a “joyner 800” header and this is the exact onw i’m looking for... Anyone know what this came off or how to find this header??

For some reason, out of no where all my tranny flue is leaked out from around one of the seals in tranny where the drive shafts come out. Buggy was in the garage for few days with no leaks, then randomly all the oil just started dripping out from one of the seal areas?? I didn’t even move the buggy... The only reason I can think as to why it went from zero leaks to major leak is the cold weather here in FL may have shrunk the seals?? Anyone else think this is rather strange? 🤨🧐 Also, antonella’s know where I can order these?

Anyone know where i can get headers bought or made for my 800cc F8b? I’ve seen some older posts where guys were making/selling them. Or does anyone have some you’d like to sell me? thx

I just finished rebuilding my 800cc SOHC f8b and boy did I wake this little engine up with port, polish , exhaust, cam and valves! I’ve richened up my stock carb about as far as it will go and still seems to be running on the lean side especially under hard acceleration. I’ve read some posts and going to try my hands at a weber 32/36 two questions: 1- Is this the best upgrade carb for the engine? 2- Will it fit with stock manifold? I ordered the Suzuki Samuri conversion kit with carb...

So dealing with machine shops in FL can be a PITA, they all said pretty much same thing. Bring the cam in and we’ll look at it but I don’t know we do anything like that. The problem is non of them would let me speak to anyone with knowledge by phone, they all say “bring it by and maybe you can speak with a machinist”. One of the major shops in the state of FL I spoke to didn’t even know why a camshaft would get ground, he kept asking me why would you want us to grind it again? I was not about to drive 2 hours to any shop that couldn’t #1 figure out why someone would grind a cam and #2 refuse to give me even a ballpark price for said service. Long story short, I gave up on locals Duane and Cletus and just sent the cam off to Joe at America Custom Cam in CA. I am looking for someone to make some headers for it, local guy quoted me $600 for headers... As a side note the things I’m also doing to the engine is Port and Polish (by yours truly) increased compression and performace valve job, opening up the exhaust. Once complete I’ll let y’all know how it turns out, wish i coulda gotten before and after dyno done, oh well it’s just fun project.

Yea my local machine shops won’t touch the cam for whatever reason 😒

I have a SOHC in my 800cc buggy, i’m looking to do some performace mods like head valves ect. I’m just having a hard time finding a place that can re grind my cam locally. I don’t mind shipping it but just need some recommendations thanks

Hey Everyone, I’ve created a few other threads and a bit disappointed at the limited responses the forums seem to get. So rather than asking about an engine swap i’d like to share some information with others here in an effort to generate some discussion! So i’ve done much research on engine swaps for my 800cc buggy, and my ideal swap would be a suzuki swift gti engine, however they seem to be rare and very expensive if you can ever locate one. The only ones i’ve seen are going for $3500+ which is completely rediculaous becuase the purpose of an engine swap should be to get an inexpensive engine that parts are available for, the suzuki swift is neither. So in my research, i’m specifically looking for a naturally aspirated lightweight aluminum engine that produces “acceptable” power. Far as I can tell such a thing rarely exists in the US, which is probably why the G13b engines are so redicualously overpriced. What I have found, and present to you is a Mitsubishi Mirage 1.2L It’s an all aluminium, lightweight 3 cylinder NA engine that’s producing 74HP and 74ft lbs torque. Not crazy power numbers I know, BUT for an NA 170lb readily available, AND cheap engine those are not bad in its stock form. Certainly those of you looking to get a little crazier than I can drop a turbo in and up those base numbers. Far as I can tell in my research No one has done this engine swap to date, so I suppose I will have to go fist... I am not quite ready to take on a project of this magnitude but will likely make this my winter/spring project and hope to have it completed by early/late spring next year. I will of course document the install and process once it gets under way. In the meantime please feel free to use this thread to discuss other possible engine swap projects or ideas for such! I love me some buggy action and can’t wait to get this swap underway.

So i’ve been looking into various options with going forced induction or a new chery etc but having a carb setup it’s kinda tricky for me... Not to mention the cost of prob 2.5k minimum. So ive been looking for car engines that would be the right cost, availability , size power etc. I found some great cheap options from Misubishi and Chevy, the 1.2L mirage and spark engines respectively but they are both efi. Question 1 how much more difficult will it be to switch over to EFI from my carb setup? Question 2 what are some common problem areas I may encounter? both engines should fit and i’m sure i’ll have to weld up some custom engine mounts. What about a diff and cv joints? anything else I may not be considering with a swap of this magnitude?

I’ve decided rather than forced induction i’ll skim the head, larger valves, port polish etc. can anyone recommend a performace guy/company to do this? thx

I have a Roketa 800cc dune buggy i’m looking to supercharge. I saw a video with an RJS charger setup but it appears they are no longer in business. Who is making centrifugal chargers for small engine buggy’s/utvs ? I’m posting in general since any supercharger that works on an utv/SxS would likely work on a buggy...

Great thanks. How much and how do I reach you to order? called several times and emailed...