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You can also add a bypass switch to the fan circuit so you can manually start it earlier. The oil grade is covered in the owner's manual. For Dubai temperatures the cold end can be 10W or 20W, and the high end should be at least 40 (so 10W-40 or 20W-50 is acceptable).

The fan works solely from the thermoswitch that is plugged into the radiator. That completes a circuit when over about 102C and should open again around 98C. The fan motor should have power constantly, and then the path to earth is via the thermoswitch. You can test the fan just by pulling the spade off the thermoswitch and grounding that to the frame (with ignition on of course).

So my vf750f is 40 years old but was once considered a performance race bike. Mine has 20,000 kms so I don't think it should be to badly expired..it was not running when I bought it. I've since gave it the once twice three times over to the better of 25-30 x . I've cleaned replaced swapped everything I can from a donor if it in anyway could be hindering the bike overall...and repair/set /fix to my best ability..with the help of my backyard tool chest and you tube advice and repair manual. I'm not a mechanic. And alot of the technical mojo can go in one ear and out another...all this said I have some issues/questions. 1) can an ignition be fixed? When I first got the bike when I used the key and turned on the lights on dash would light up showing neutral oil etc..and the start button worked once only. Now they work when I jump the relay and the bike starts.but with the key in ACC position or on theres nothing ..and yes turning the key off kills the bike still .and the run/ off switch work still .....I took it apart and everything looks normal....what am I missing here. 2) having this issue leads to questions #2.. if the bike is running but the ignition not functioning as it should..will that allow my fans to work when they should? Or will it not get some signal to turn on? ...or is this a different problem to source out...and last where am I losing my power..bike starts idles runs...but is not anyway shape or form a performance machine that I'm sure it should....I've done carbs over. Air leak tests .coil swaps. Igniters boxes .air filters. Anything I can think of ..besides cams...and it seems to just run flat... No giddy up......it's better than when I bought it but not Winning any races....

Have to agree with you there, the CT is NOT an off-road bike.

As far as I know, YES: VFR is made in Japan only. It could be possible that the homologation plate may vary according to the destination country. Further to the temperature, as Worfje wrote, VFR runs averagely hot even at temperate climates. In Dubai, I expect the liquid to run superhot as soon as the speed gets lower, below 40-50 kmh. My only suggestion is to change the oil more frequently, since the high temperatures will degrade the oil rapidly. On the market you may find some coolant additive to get the temperature slightly lower (althought their impact is a few but, you know, everything could be of any help)

Concur. I got my set used off a 6th gen. Works just fine on my 5th!

VFRs tend to run hot... so I hope there aren't too many traffic lights over there. 🙂

I assume Honda made all VFRs in Japan? But, there are some Dutch words on this plate... so I assume it was sold in the Netherlands. But also some Spanish...

Hello everyone, can someone help me understand what is the country of origin of this vfr800? Also i would be happy to get any suggestions regarding specific engine oil viscosity to run in hot climate 45-50 degree celcious weather. (dubai)

250725 - SMALL UPGRADE Some beautiful pieces of engineering came into my garage, today 😎 One is the forkbrace plate I was waiting for, machined by my good friend Mario running "Torneria Baderna", a billet machining workshop in northern Italy The smallest is a shaft holder, designed to embrace the gear selector shaft; this reduces its cantilever and makes the gear selection more precise, also preventing the oil seal from damaging since the shaft is less prone to bend. And the forkbrace plate finally in place. The previously installed plate was fine anyway, but this one is keeping my name on it, so I'll be surely faster 😎 😁

Thanks Mate and good luck with the bike, looking forward to seeing how your bike turns out with all the upgrades, great engine that you are familiar with already, that's the most important thing. The only thing I don't fancy is the spoked wheels, think it was a form over function decision by Honda, there was no need for spoked wheels on a bike like this imo anyway.

Swapping to USD forks on your Honda VFR800 (2014) can be a great upgrade for handling, but it’s tricky due to the ABS/traction sensors. If the new forks don’t support the OEM sensor setup, your ABS and traction control may stop working or throw errors. Changing the wheel, discs, and sensors requires custom work or a donor setup with compatible electronics. It's not plug-and-play do it only if you’re ready for fabrication and tuning.

Dave Moss has live internet video suspension set up sessions you can book, check his site for in person sessions also. I paid for his subscription service to get videos on the MS setup, he may have some for the Aprilia. I have a 1100 spring on my ‘99 and my ‘98 came with a 1200, seems good for me at 205lb.

That 6gen set ae86andkp61 has should be the same, I don’t think the 5g and 6g they made up were any different.

It's good to know CB600F plates will work too.

Subscribed. I could be interested in a 5th gen set.

I have taken MD up on his offer. I really appreciate it. I find that most aftermarket products for these 5th gens are starting to dry up. Which is a shame for such a fine machine that will last the test of time.

Hey, thanks Gaz, bmart, Terry et al. This is really useful, keep it coming. When I put an Ohlins shock on my RC-51 I was lucky enough to do a track day soon after and work with Dave Moss. He set it up near optimum but I wish I had absorbed more knowledge at that moment. Now my new bike has Ohlins front and rear and I'm determined to become more skilled at suspension set-up. I really appreciate this discussion.

Buy MD's plates first! I bought some plates off Aliexpress intended for the CB600F and these were a perfect fit for my 6th gen VFR. I suspect (and don't quote me on this) that most PAIR valves are the same size across Hondas. https://www.aliexpress.com/item/1005005857589827.html?spm=a2g0o.order_list.order_list_main.120.2bbf1802t17SFF

If you're getting hammered by the suspension, it defo needs looking into asap. Some chimp may have been in there & screwed things up. My advice is drop the forks & at the very least flush em out & give em an oil service, fork may be overfilled? this will defo make the front end way too stiff, if not nearly solid. Can you bounce the front end pumping the bars up & down? Can you bounce the rear end pumping grab rails up & down? What actually happens when the suspension is cycled up & down? Rear shock or linkage bearing could be seized causing you harshness, shock could be seizing ? Spanners out time, or you'll end up in a hedge sooner rather than later. For your weight range, you'll find the stock shock spring is way too weak, you'll get far too much sag, don't even waste time playing with it, it's defo wrong for you. Manual states stock spring is 130N/mm = 742lb/inch, no wonder everybody complains the stock shock is under sprung, this weight spring is more than enough on most bikes, but the VFR800's use a linkage ratio that requires a crazy heavyweight spring for an average rider weight of around 200lb. I've spent a good few hrs spring testing, right up to 1100lb/inch. For reference I'm 230lb in full summer gear, 1100lb/inch spring gives (10mm bike sag) ... (25mm sag with rider) which I've pretty much settled on being in the ballpark for my weight in full gear. This spring weight is impossible to source here in the UK, I found a spring manufacturer (Faulkners) they make stuff for motorsport, they made me an 1100 & 1200lb spring. A spring of this magnitude takes some compressing to get onto a bike shock, be super careful if you find yourself going down this rabbit hole, it's all too easy to lose a finger or two if you go about it the wrong way. I've not yet tested the 1200lb coil, don't forget its the spring that supports you & the bike, not the shock. I've fitted this monster of a spring onto a Showa BFRC-lite shock from a 2020 ZX10R (twin tube) design, that I (McGuyver'd), shock hangs from a modified GSXR1000 alloy top mount, this gets me 325mm stock shock length, I also modified top mount to have threaded ride height adjustment, gives me up to +10mm ride height with clearance for exhaust, rebound damping defo needs sorting, I've barely got enough enough spring control at max rebound, shim stack defo needs pulling & stiffening a wee bit, it's a way better shock than a stock sealed unit, plus it has comp/rebound damping adjustment & threaded preload rings, it's serviceable & easily sourced & fairly cheap on eBay, for what is essentially the same design as an Ohlins at 5 times the price. Hope this helps put things into perspective?

I can ship you 2 plates I consider "scrapish" check PM... Then I am totally out there aint no more...

Does anyone know ,or how to work out, the total amperage use on a standard unmodified A3 Vtec 800?. I still have charging problems in spite of renewing EVERYTHING, I am now wondering if there is some kind of weakness in the new stator as it tests great. ( the OE honda stator should kick out 0.47kw., 470watts?) 65vac on each phase, 20vac idle, less than 1 ohm resistance and no continuity to earth from any of the phases. 14.4v running with no headlamps on, 12.2v with headlamps plugged in. I am determined to beat this bike one way or another. Now I am waiting on a 100Amp ammeter with shunt to test current draw when bike is running.

Turns out the guy on Ebay doesn't ship to the USA. Maybe someone can provide measurements so I can have some made or I can take the pairs off and take it to a machinist and have him make some blocking plates for me.

Oh no! How did the light install go? I'm on the edge of my seat. Like one of those episodes on TV ended and they canceled the next season. I'm busy making list of things to do to my bike once it arrives. This is an awesome thread. Thank you so much for the time you have invested in this sharing.

Hi, I owned this bike from approx 1996-2006. I will post some of what I know of the history if anyone is still interested. There are still a few gaps, like you pointed out, as to the origin of the paint, but I think you are correct about the bike Italian market origins.