'86 Oil Pump Conversion for the '84/'85 VF500F

I've been giving some thought to switching out the oil pump on my '84 to the larger '86 model and wanted to get some feedback from other owners who have done this.

From what I have garnered the '86 parts needed are:

#2, used '86 oil pan (OEM part no. 11210-MF2-710)
#3, gasket (OEM part no. 11315-KE7-000- same part number for all years)
#9, used '86 pickup tube + 2x #26 bolts to mount this
#22, oil seal, pipe (OEM part no. 91315-MF2-711)
#4, used '86 oil pump and check valve assembly
#19, O-ring,14.7X3.7 (OEM part no. 91308-MA6-005)
#13, oil pipe - this part can be reused (shares the same part number for all years)

Also needed are the mounting bolts for the oil pan, same part no. for all years, M6x1.0x28mm (OEM part no. 96001-06028-07).

The oil dipstick (aka 'gauge, oil level' part no. 15650-MJ8-010) is the same for all years.

To be confirmed,,,the original '84/'85 oil pump sprocket (part no. 15134-KE8-000) was superseded by the '86 sprocket, #6, (part no. 15134-KE8-010),,,not sure if there was a change to the design. The oil pump chain, #7, is the same for all years (part no. 15140-415-003).



My question is if the deeper '86 oil pan has any clearance snafus, with the stock exhaust and chin cowl, that would prevent its installation.

Any thoughts would be most appreciated.

Thx!

 

LOL, thank you for the compliment.

I wish I could take the credit here but actually I read about this one on the Yahoo VF500F Owners' site - a shout out to Noël and Pat for the intel.

I am thinking that this will be a straightforward modification/upgrade that isn't a budget breaker – always a good combination.

The trick will be to find a good set of used parts and to see if I can round up the new parts (gasket and o-rings) from Honda.

 

A little more intel on this.

Added to the required parts list - the '86 exhaust pipes and collector. The '84/'85 models have different part numbers for these, which makes sense as they were designed around a shallower pan.

Schematic from the '84 FSM



Parts Fiche



On a side note - vintage 4-2 or 4-1 exhaust systems may not clear the deeper '86 oil pan.

I know of one owner with a Yoshimura 4-2 on an '85. He was considering making the switch to the '86 oil pump but the '86 pan is too deep to clear the exhaust pipes on the Yosh setup. Not sure if they made and '86 version but I would bet these are significantly harder to find - if they are indeed out there.

Yoshimura 4-2 on an '85 VF500F (note the header pipe clearance to oil pan - this exhaust system would not clear the '86 pan)





Oil pan comparison (photo courtesy: sirepair, Yahoo VF500F Group)

 

you may have to go with a custom exhaust..I know way obvious...but thats me ..Capt obvious....good luck with the mod...

 

Oh to have a friend who owns a pipe bender

This said, I would be okay installing the stock '86 exhaust but in a way I like the idea of having the option of going to an aftermarket 4-2 or 4-1 system - if I could locate one of course.

As a side note - from what I've read to date, the vintage 4-2 and 4-1 systems, that were originally offered for the VF500F, required the removal of the stock centerstand as well. Not a deal breaker, but good to know.

It could be that the '86 oil pump conversion, for my '84, is an idea that stays on the sketch pad for now.

 

Would any '86 VF500F owners happen to know the specs for the oil pan bolts? I was looking through the parts fiche but I (surprisingly) did not see them listed. Thx!

 

I searched my Honda service manual covering '84 thrugh '86 models and found nothing referring to the size or torque value for the oil pan bolts. The only reference I can find as to installation is "install the oil pan".

Update to post: I searched the parts fiche on Bikebandit and the bolts are shown as 6/28 flanged screws. Torque values listed in the Honda service manual for this size screw is 7-11 NM (5-8 ft.-lb.).

 

Thanks creaky. If I could ask a favor, could you please post the parts fiche drawing that shows the bolts?

 

You ic are a pioneer...so when are you going to share some of your secrets that you've found?

 

Here's a link to the page 1985 Honda VF500F INTERCEPTOR OEM Parts, 1985 Honda VF500F INTERCEPTOR OEM Motorcycle Parts - BikeBandit.com

 

Thanks creaky.

The parts fiche I was referencing (both CMS Spares & Service Honda) did not have this listed,,,I am not sure why.

M6x1.0x28mm it is (OEM part no. 96001-06028-07).

 

I actually had to go from 86 to 84/85 on my race bike because of the aftermarket exhaust. Most systems were designed and sold in the 84-85 years. Anything that crosses over under the oil pan would probably be a problem on an 86. Don't think it matters with stock exhaust, I think where the collector bolts is the same height on both pans (could be wrong).
Mike.

 

Would you happen to have the stock '84/'85 and the stock '86 exhaust systems on your spare parts shelf? I'd be curious to know if the headers/collector box are different. Thx!

 

If you need a 86 stock exhaust system let me know I have one laying around just collecting dust.

 

Other question you said in your original post you don't think vintage exhaust systems wouldn't clear the 86 pan but there have been a bunch of threads with guys buying vance & hines and hindle systems to there bikes with no figment issue.

 

Thx, yes, I wasn't sure about this originally but I have since learned of systems that do work with the '86 pan. I have another thread stared regarding this,,,

http://vfrworld.com/forums/1st-2nd-generation-1983-1989/30249-vf500f-aftermarket-exhaust-systems-back-day.html

 

That would be very helpful, thank you! I'll send a PM.

 

Just looked at my 86 race bike with the 84 pan and my 86 street bike. The quick measurement I did looks like the bosses to mount the collector are both about 7 cm from the pan gasket on each bike. I'll see if I can dig up an example of each pan and verify exactly. Of all the switching around of parts I've done over the years, Ive never ran across a stock exhaust that didn't fit, BUT, I may have just been lucky. The oil pan on the 86 is recessed around the mounts, and the 84 pan has posts that extend to meet the collector. I believe the V&H (and Kerker?) full system combines the front and rear of each side, therefor it doesn't have to cross over the oil pan. The system on my race bike, combines the front head into one and the rear head into the other (the way it should be). The Hindle (4-1 I assume) may have been produced late enough to account for 86 pan?

 

Capt80s could you go into a bit more detail on why a 1/3 & 2/4 relationship (rear, front) is the best way to run the headers? If I could ask, could you please post a few photos of the exhaust system you have on your race bike? Thx!