Recently RVFR and me were talking mods and I brought up that i would like to adapt the 5g EFI to my 4g. I know there is quite a bit of mechanical modifying that will have to be done and i will most likely need a good majority of a 5g wiring harness. Since I doubt i am the first one to think of this, Im looking for feedback pertaining to what i may have missed in my thought process here.
I'm curious too, seen the swap on cars so this shouldn't be to tough, ha ha all those sensors will no doubt kill this idea, but ya never know
Would it be easier to buy a wrecked GEN5 and put in the whole drivetrain? I dont even begin to know about the difference in mounts ect....
Hmm, looked at my 5g service manual (have to know your enemy LOL). Lots of sensors. Does that mean the 5g have a higher output alternator? And a cam trigger, so will I have a problem making that work with the center-mounted cam gears? You would have to cut the linkage apart to fit the throttle bodies to the 4g engine and build new ones. And what the hell is a starter valve? Imagine you'd need the 5g ECU as well (non-VTEC) but that means you could run a Power Commander on it. Also means a new airbox. Bigger fuel pump and more return lines to the tank? Is VTEC a 5g thing or a 6g? I think Ill print out the fuel and electrical chapters and see what i can see.
vtec is 6g. i'm thinking you would have an easier time doing a full engine swap from a 5g that was totalled or something, but for the kind of costs you're looking at, buying a 5g is much easier. i think the main differences were the added displacement, linked brakes and FI so you could delink the brakes like MD and then you have what you want. if you really like the older style plastics, I bet you could get them to fit somehow...
Biggest issue in a swap that keeps it from happening is the VFR800 uses the rear engine case as the swing arm pivot point, so thats a no do to a 4th G, yea I too have looked at the whole mess as what's what, yep easier to convert a 5g as in get rid of the linked brakes and while at it swap out the front forks, different shocks. hmm maybe even wheels, did I mention Safe-Ts VFR for more photos of this excellent example of the bike Honda should have built in the first place, go to SAFE-T photo album, very nice.
5G FI on a 4G? I think your nuts - the 4G throttle response is smoother down low than a 5G. If you want to tweek it - go for jetting changes with a pipe. It will run better and save you a bundle and tons of agravation. -SAFE T's ride is sweet- nice job.. - I did the brake delink using Super hawk lowers and RC51 brakes, check out gallery. MD
I owned a 4g and ran it about 27K miles. The thing is sweet. The low and low mid range seems to be a bit fatter than the 5g. I think that is from the 4th's longer stroke. I had to make an adjustment when I bought my 5th in that the 5th is more snatchy off the bottom. MD
His bike rocks! I Couldn't agree more with that statement... I've read your brake delinking job about 3 of 4 times, that job of yours looks so intimidating, I've always been envious of people who could do such a job, I guess that's why I'm getting ready to fork out a grand for my suspension work :doh:
Buy all the stuff and I will help you do it (or do it for you). I read that how-to also and I didn't see anything that would cause too much trouble.
It really wasnt that bad. The suspension work I did makes the job look more complicated. My main consern was making sure that whatever brake parts I used would do the job safely. Once that was figured out, it was throw out the parts you dont want, bolt on the parts you do want.Yeah, there was some fab and finagleing here and there - a lot of it was 'cause I'm just picky, hazards of being a gearhead engineer geek. - I traded emails with a guy who bought Super Hawk lowers from Service Honda for $300. (he says) That's much cheaper than what I did. I think if you scrapped around you could get away way cheaper than I did. For me, I didnt know what would work so my experimentation cost me mucho more. MD
Oh that pic.. I dont know what came over me but somehow I got into a mode of - let's see how far down I can strip it. I was even thinking to crack the engine open for some port and polish work. Four bolts and the frame lifts off. Fortunately a bolt of lightning hit me and grabbed me around the neck and said "are you nuts?!! You have too much time/bucks in this thing already!". So, I just painted the swing arm and worked on putting it back together. - In no way do you have to take it down that far... MD
