still searching for crank for 83 750f

hey guys im just wondering about what year cranks will fit in my 83 750f , or will only ones from 83 fit in it ? ive been checking out ebay but they i dont really trust it very much i dont wana buy something thats not going to work , is there any advise you guys can give me on finding the right crank that will work ?
thanks

 

About the only thing else is to hit the web for mc salvage yards. Most have web sites you can use e-mail for questions on parts.

Something else to think about. IF and that's a big IF, the vf1000 piston pin height is the same height as the vf750. Then find a 1000 crank and rods. Then you'd have a 750 "stroker" motor. Haven't figured out what size it would make it, but you'd have more torque and cc's. If the difference for the longer stroke is made up in the rods it should work. You would have to get new rings and a hone job.
Dave Dodge should know if you could do that I would think. I mean use a 1000 crank in a 750 case. I believe both cases are the same. mmmmmmm I might start looking in to that my self. Shouldn't be that expensive I would think.

Oh yea any crank from 83 to 85 from a 750 should work .

 

v45 Magna crank may work

Hi, I saw your post and thought I'd offer what I know. I had an 85VF700F back in the 90's and wanted it to be a V45 of course. First I went through the microfiche (use the online one's at ron ayers or bike bandit) for the V45 models and discovered they used the same bearing shells so I went to a local boneyard in the area and purchased a v45 magna motor complete. I stripped and measured all the parts and then I installed my 700 rods (longer) on the magna long stroke crank and had a machine shop cut down the squish band on the pistons and I had a 12.5:1 long rod stroker kit. You should be able to swap the cranks 1 for 1 and since the crank failed you will need new bearing shells anyway, great time to put a top end oiling kit. The thing worked great in spite of the fact that the magna's crank turned backwards its whole life. The cranks are actually splined on the output side end and a gear goes between the crank stub and the clutch basket. If you are going to attempt it yourself be sure to invest in a Honda Factory service manual, they are outstanding from that era.

 

so are you saying that a crank from a magna or sabre will work it just has to be fliped in the case end for end??? is everything else about them the same ? becasue that would be great im finding lots of them on ebay i even see someone is selling rod bearing on there now for 20 bucks, im not familiar with these engines and have no idea what cranks from other bikes or years will fit my 83 750, these forums are great for gathering info !

 

and one more thing , what does the top end oiling kit consist of ??? is it just better oiling tubes ? and is it something i can order somewheres?

 

The crank rotates forwards in your Interceptor because its chain drive. On the magna's and sabre's it rotates backwards because they are shaft drive and that's how Honda set them up. The crankshaft and case halves have numbers and or letters stamped into them to let you know what color bearing shells to use (the manual details how to select them). The top end oiling kit takes oil from a higher pressure source (the main oil galley on the right side of the engine) and routes it directly to the cams with replacement lines. There should be a bunch of info on this site and the vfrdiscussion site about the oiling kit. The potential donor crankshafts are from V45 Magna or V45 Sabre 750cc engines from 83-85 in the US anyway.

 

so im a little bit confused , you say i need the numbers from the case and crank to size up the bearing shell , so does the replacement crank i get have to have the same numbers as my old one , or do i just use the numbers off my new crank on the reference chart in the manual to determine what size bearing i need for my rods ????

 

Your new donor crank will have numbers on it. They all do. In fact the numbers may be the same, but they have to be checked. Basically its production tolerance. They make a range of shell thicknesses that are color coded so the crank main bearings and rod bearings have the right clearance.

 

I have a whole engine on a parts bike (85 vf700f ceptor) I'd be willing to donate if you wanna come to Massachusetts to get it.