new cb750f owner

[Mr. Buick]

 I just bought a 1982 cb750f supersport for $300 (it's untitled and a little rough physically so that's why) and I have some questions about it that maybe you more experienced folks can answer.  Did this bike have the option of coming equipped with a full wraparound fairing like the Goldwings or did someone just graft this one on?  Also is the oil light indicative of oil pressure or oil temp?  After I've run the bike for a while, when sitting at idle the light flickers intermittently or if it's been run for a good long time it stays on.  When I blip the throttle a bit it goes out until the bike settles back down to idle.  Never does this cold so...  I rescued this bike from a farm where it was kept in rented mule status, in otherwords, taken out and flogged for fun then put away.  I'll be restoring it this summer and winter and hope to have it back to its original glory next spring.  Any help would be great.  Thanks :)

[LukeM]

Can't answer the fairing issue.  I've seen some with it, and some without.

The oil light should indicate a certain amount of pressure.  Cold oil is thicker than warm oil. So the pressure would be higher when it's cold.  Warm oil is runnier, and needs less pressure to circulate around the system. It's possible your oil pressure sensor may be going bad, or perhaps there's some thinner oil in the crankcase. First thing to do is change the oil and filter using the recommended viscosity.  Re-Run recommends a Rotella synthetic (do a search on the forum for Rotella to see it), and I think the factory service manual recommends a 10W40 non-energy-saving oil.  If that doesn't resolve it, check to make sure your idle is at spec.  I have mine set to about 1200, FSM says around 1000. If those two are ok, then the next step would be to replace the oil pressure sensor with a known good one.  If _that_ doesn't do it, it's time to dig into the oil pump and see what's going on there.  Let's hope it's the first 2 or 3 items.

$300 sounds like a great price for a neat project.  I got mine as a birthday present from my family.  Only cost them $500, and between tires and other little stuff, I have another $350 in it now. It's fun to tinker with.

I hope this helps.
Luke M

[Re-run]

I would guess that it was possible to buy it with a fairing. Many bikes had the option but it would normally be a hondaline fairing. Vetters were common as they usually came in a kit to mount.
The oil light should indicate oil pressure. Usually 3 reasons why this may happen. 1: oil may be thin or old. 2: oil pump may be wearing out. 3: sending switch may be worn/not working right.
Download the manual and it will show you how to check the pump and switch. Also, if you have not changed oil, I would do that. I suggest rotella 15-40 for conventional. If you use this and the light goes out, then that was probably the issue. Now it will, of course, still be on when the bike is not running and for a second or 2 on start up.

Welcome to the club make your self at home!

[Mr. Buick]

On the fairing, I've seen pictures now that have a sort of half fairing that goes around the headlight and handlebars but this is a fairing that covers the legs and all that plus a 2 foot tall windshield.  I dunno if this is stock or not.  On the oil answers, thanks guys (or gals :)  I was wondering what to run for oil in it.  I used to run 10w40 Mobil 1 in the 250 Ninja I had before this.  Isn't rotella for diesels?  Only application i've ever seen for it.  Thanks for the welcome; I look forward to making this bike a prize.  Pics when I can take some.

[Mr. Buick]

I just realized I might be showing my ignorance.  Is vetter the term for a full frontal fairing?  I've seen it quite a few times in my searching across the web.  And I had another question.  Does this bike have any sort of mechanical timing advance or is my clutch going out or what?  Under hard acceleration when the tach reaches 6k or so its speed of advance spikes and the bike revs at least twice as fast toward redline.  My buddy thinks it's a VTEC type effect but I wondered if the clutch was slipping at that load level.

[vern401]

Yes rotells is for diesels BUT it works well in these older bikes also. The 750's are not the only ones that I am seeing  people use it in. Re-run may know the chemical that is in it that these other oils have had removed due to cadilac converter issues with cars. I'll be putting it in my CX, ZX, SL And CB when I do there oil changes. Right now they have castrol GTX in them.
Fairings: Yes some of these bikes came with Full fairings on them but like Re-run said they were an add on with the 750's. I like them myself but allot of people do not.
Hope this helps.

[vern401]

82 cb ---- ok you have CV carbs on it and electronic ignition. The timming advance is behind the ignition pickup coils.
There is a PDF book on file here that you can use to fix up your bike.
I would check the clutch adjustmen to make sure.
I would also change you oil since it was used for joy riding which is hard on them.
Vetter is a manufacture that made aftermarket dress up parts for bikes.

[hexguy1]

Vetter made fairings for lots of bikes, there was one on graigs list /spokane wa.. as for your oil light I would suspect that if the oil is not low, you have an oil punp problem

[vern401]

Another thing I am seeing with the older bikes is that they tend to be picky in reguards to the clutch and type of oil. Zinc is the chemical that automotive oil is lacking that the diesel oil has. zinc tends to ruin the cadiliac converters. I'm still looking for more info on this and will let the forum know what i find out. I do not want anyone to have major problems due to wrong oil type or going from mineral oil to synthetic diesel oil. I will be sticking with the castrol GTX for now since I have had great results using it.

[ccRider246]

I have an 81 750F. It came from Honda with teh fairing. I have the original owner manual for the fairing. I suspect it was made by Vetter but the manual calls it a Hondaline Fairing. The manual lists it as being used on a CB750 Custom/F/K, the CB650 Custom, and the CX500 Deluxe/Custom. Let me know if you want a copy of the Fairing Manual. I could scan it and email if you'd like.

[LukeM]

Actually, you could scan it and upload it to http://www.craigvetter.com  There's a LARGE collection of documents for his fairings. He made many different models.  Give it a look, and upload it if you could.  The rest of us riders will appreciate it.

Luke M

[Re-run]

Hell if you can scan it and put it up here, that would be great. If it wont upload, email to me if you can.

[ccRider246]

It's not very long. I will scan it in tonight and upload. I don't see any Document section or Technical Support section on the forum so I will put it in Repair Sources and Write Ups and someone can move it if they want. It will be late tonight - maybe midnight EDT.