My Vf1000 frustrations

Thanks for your imput guys. I know none of you want me to give up and it probably is something simply. I have concluded that the F2 motor is incompatible with the rest of the F1. I have tried pretty much all of the suggestions in one form or another. This is also not the first mechanic who has looked at it but he has been the most thorough. Compression is OK. I have also tried swapping over the coil leads and wiring.

The other option is to rebuild the original motor using parts from the first. It's all there, just needs to be put together. It's probably beyond my capacity and I've spent two years working on it so its time to move on. Someone else might pick up the project.

Hey Minax, postage on a tank and fairings is going to be a fair hike from here. If I do part it, I'll get back to you.

Thanks everyone for your interest.:smile:

 

Here's a photo of how I will remember it.......going!



Cheers

Techno

 

Pic now works!

Damn my lousy computer skills.

OK, anyone else need some parts?

 

tell you what, gimmi an idea on price for all the plastic and windscreen, tank, seat, luggage rack, clutch cover, and mufflers, and what shipping would be like to Pittsburg, kansas.

 

PM sent. Anyone else need some hard to find parts?

 

The 84 VF1000F has different ignition triggers and different triggering rotor these are located under the clutch cover on the right side of the crankshaft. The triggering rotor is part of the starter clutch. The triggers and rotor are matched to the spark boxes that are located under the rear fender fairing. To be sure check with a Honda dealer and see if the part numbers are different 1984 to 1985 for these items. I believe you will have to change the two ignition pick ups and the starter clutch from your 1984 motor to your 1985 motor. I fairly confident that will help if not cure your problem. However, first check the part numbers to see if they are different. You need all 1984 or all 1985 ignition parts. I would advise to leave the carbs alone (stock 1984) until you get the ignition system matched up. Good luck.

 

well my bike only goes to 2k rpm like a revlimiter but its a 83 sabre 750 but it has a 700 it it i put all new (used) parts ignitor boxes (cdi i have 4 now) pulse genorators i have 3,wire harness ,carbs and still only 2k rpm it idles fine and everything it just wont go past 2k. but i will look at the starter wheel thing and see if they are the same from the 750. ahh this sux

 

After giving up sometime ago, the bike has just sat in the corner of the garage doing nothing. I thought about parting it out but it seems too much like hard work selling it piece by piece. Local wrecker isn't interested in giving me much for it.

Some of my friends have project bikes in the garage and that gave me some inspiration. The other day I was away for work and dropped into a bike shop that I sometimes visit. They had a 1984 VF1000R for sale and it was the saddest looking thing I've ever seen. Not looked after at all. It made me think that mine was in much better condition for its age, if only it ran.

Its not costing me anything while its sitting there so now I'm thinking of taking out the 1985 VF2 motor (I'm resigned to the fact that its just not compatible with the rest of the bike). I'll then pull down the original motor to see what it needs doing and, if I can get it going, slot it back in. If I need any major parts such as heads, valves, pistons, I've already got them sitting there.

This is turning out to be a long term project but its just too good for its age to scrap it. Maybe I'll get some more enthusiasm soon.

 

did you ever change the cdi box

 

I know that you are fed up but I haven't gotten to add anything so I am going to now. I had a dead cylinder (#2) and it wouldn't get as warm as the others. It was a blocked fuel jet. I had to take both of them out and spray out the gum from all the little holes. I did it again recently too. But the low RPMs is wierd for sure. Something tells me that the coils were going bad. They do go out you know. But if you are not in the mood to check I understand its frustrating and you have given it a hell of a try. So 3 chears to you for your effort.

 

do you think a 83 750 is diferent then a 84-85 700.i noticed that this s#%t only happens on engine swaps

 

well it was the trigger rotor.i was in shock when it went past 2k rpm oh hell yeah !! like he said swap the starter clutch and you will be on your way to 2500+ rpm:third:

 

Techno to may have given up but as long as you have a strong back we won't give up on trying stuff. Have you tried doing a handstand on the handle bars while turning the key with your teeth? It sounds like the clutch is the ticket.

 

I don't know much about the 1000 series especially in the land of Oz but aren't those motors different?

IIRC, the 84 1000 is the original VF series while the 85 was the gear drive model. The electrics and timings could be very different. Just a thought.

 

No, the 1000F continued for a couple of years after the 84. The 85 F model was just a different paint scheme here. He is using the engine from a FII. It was a european model that had a full fairing, and chain driven cams. They were apparently also available in Canada, but I never saw one here.

The R model (gear driven cams), came out in 84, and ran for 3 years to 86.

 

my vf1000f frustrations

Yes I believe the ignition is different. I haven't changed the CDI boxes as I don't have any others but I suspect that may cure it or go along way towards it.

The VFII motor is not a good fit in the frame anyway. This would cause chain alignment problems so its coming out anyway. Even if it did go, it probably wouldn't pass inspection for registration. Just remains to be seen if I can get the old motor worikng again to reinstall.

BTW both motors are chain driven cams, not the gear driven ones found in the Vf1000R.

Thanks for all the support

 

Read throught this string to avoid starting work this morning.... wow. Definitely the engineer in me for his to be enjoyable summer reading...

Had a friend's Dad tell me once "Don't to let the bike out smart you" ;-)

Good luck,
Paul

 

I had a similar problem with my 85 and bypassed the fuel motor. I made sure the fuel still ran down to the filter and gravity works. The motor seemed to stop sometimes?? I haven't got around to buying a new one yet but it runs fine.

 

I'm also looking for a new spring plate for my vf1000f...any ideas??

 

Hi Techno,
Think you'll find that the FF motor you have put in uses one igniter box. Your 84 model has two that's why you're replacement motor won't have it with your original boxes. I have an 85 FF which I bought as a non-runner and have rebuilt but now need to get a spark unit for. I've broke into the box so I'm going to source the primary internals on the circuit board and have a go at fixing it. Nothing to lose really.

Cheers
Trev
Perth WA