2FAST4U

Hi Mohawk,

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Thanks VFRDiscussion

I don't have time to read six pages of posts but when I saw the title to this thread, it immediately made me think of an incident that happened a few years ago in the midwest.

A police helicopter claims to have "timed" a guy on an RC51 going over 200 mph. The RC51 was bone stock except for slip-ons. The guy on the bike insisted he was maxed out at 160 mph but the police wouldn't budge from their "calculation."

The incident ignited a firestorm of responses from motorcyclists like ourselves that insisted there's no way on earth an RC51 can reach 200 mph. Absolutely no way. Even the editors of major motorcycle publications came out and said that, while going 160 mph on a public road is stupid, unless the RC51 was turbocharged (it wasn't), there's no way that bike can get even close to 200 mph.

The cop said he was counting the mile markers on the highway and looking at his watch and calculated the motorcyclist's speed at over 200 mph. He insisted he was right. When the police officer was confronted with insurmountable evidence to the contrary, as expected, he refused to admit he was wrong.

I'm going by the universally accepted (and published) compression ratio. For the current CBR1000RR, it's 12.3:1. On my bike, it's 11.6:1.

Your bike's compression ratio is 12:1 (which is already high).

If you're serious about having some even higher compression pistons installed, as well as porting and polishing the heads, and having somebody grind you some hotter cams, you're probably going to need a full exhaust, a reflashed ECU, and intake work done as well. I seriously doubt you'll find someone (especially where you live) that has the ability to do that kind of work on a VFR1200 DCT.

You may want to start looking for another bike.

Ever seen a chrome one? I think I'll pass.

Note to Seb: Not trying to hijack this thread but with your fabrication skills, you ought to consider coming up with a new headlight for the VFR1200F. It's the one part of the bike a lot of people just can't get past. Maybe you can have somebody send you their headlight so you can make a mold out of it. Once you've got something to work with, you can come up with a custom headlight design. You can even get ideas/input from members on various worldwide (e.g. British, German, etc.) VFR forums.

Although I don't have the link, I remember it was an Englishman on the British (or European) VFR forum that did it. If memory serves, what made the job more difficult than he anticipated was that many connectors (e.g. electrical, cooling system, etc.) didn't match up (he still got the whole thing to work, though.)

Although he spent a lot of time on the project, I don't recall him saying it cost him a fortune.

Best of luck to you.

I own that bike but can't answer your question because Seb did the work Maybe he'll chime in shortly and help you out. He lives in upstate New York so getting him to do job probably won't happen (I lived in Philadelphia eight years and rode up there.)

I would not have attempted this mod on my own. No way.

This is a '96 (Fourth Gen.) VFR750 with '03-'04 CBR600RR fairings (excluding the rear cowl -that's a Sixth Gen ['02-'09] VFR800 subframe and cowl.)

You're gonna have to put a lot of work into fabbing mounting brackets because the CBR fairings aren't even close to being direct bolt-ons. Ditto for the subframe.

Best of luck to you.

I found the schematics/instructions for one that was developed for an RC51 initially, then adapted to the ST and the VFR. I am thinking of trying it out, looks like a fun build.

http://www.speedzill...es-plans-1.html

Since you're good with electronics, you ought to build 'em and sell 'em here.

On another note, do you still have 6th gen. HID kits available?

Somebody posted this link on another forum. If it's a re-post, feel free to delete.

http://www.kawiforums.com/how-tos-faqs/121549-diy-chain-rivet-tool.html

I agree with both of these guys: Silverstar bulbs don't last long.

Forum member Tightwad recently came out with an HID kit for the 6th gen. VFR. You may want to look into it.

Just an FYI: that's not a visor nor a screen. It's a shield. A visor is like what you see on baseball caps. Many 3/4 cruiser helmets have small ones (off-road motorcycle helmets have them, too.) Screens are what you have on the front of your bike, i.e. a wind screen.

The Russian guy is right. If you're having trouble getting a scratch out, you're better off buying a new one than to keep spending time and money on it. Better helmets (like my AGV and Suomy) come with scratch-resistant shields. If your helmet didn't come with a scratch-resistant shield, see if they make one for your helmet and just spend the $45 or so on one. Motorcycling is dangerous as it is. The last thing you want are scratches on your shield distracting (or worse, obstructing) your view. Better shields are likely to be fog-resistant as well.

Good job. Now how about a matching front wheel??

Seriously, I've always thought a size 190 tire would look better than a 180. The CBR1k has a 190 and is a smaller bike.

I've got an 8-spoke rear wheel that's been sitting here for months. The problem is if I get it powder coated, I'm gonna have to powder coat the front wheel to match. Then I'm gonna want to powder coat the front brake carriers. Then I'm gonna need fresh rubber. Now that I'd have such good looking wheels, I'm gonna want to repaint the entire bike. :sad:

Pictures please!!!

For starters, good job (as usual.)

I don't know whether I just now noticed it or I forgot: The bike's got handlebars?!

Out of curiosity, have you ever tried to put another bike's bodywork on a 6th gen. VFR? I would think an RC51 would be a good place to start (and since you once owned both bikes, maybe you tried it.)

Here's a Z1000 with a ZX-10R front end (forks, fender, and wheel) and a VFR SSSA. The rear wheel is an automotive aftermarket wheel. The guy that built this said it was.

Some car wheels will actually do the trick. I couldn't find the thread but there was once a thread (that I actually started) about a guy whose Z1000 had a ZX-10R front end and a VFR SSSA. I forget what kind of rear rim he used but it was an aftermarket car rim. It looked sick. It just so happened to have the correct offset, number of lugs, lug pattern, diameter, and width for his 190 tire (it may have even been a 180 like ours.)

I'm open to any ideas or criticisms out there, so keep it coming.

Maybe this link will give you some ideas on lightening a bike. Someone posted it on the local forum.

http://www.ducati.ms/forums/showthread.php?t=76500

I think you might be confusing pessimistic with realistic. Nobody is discouraging you from doing it. We're just saying that what you want to do, simply put, isn't realistic. The Suzuki GSX-R 750 is a serious track weapon and is not to be taken lightly. Another thing to consider is the wheelbase on your VTEC is over 2" longer than the GSX-R 750's. That certainly doesn't work in your favor and, strictly speaking for myself, I don't know what in the world you could do about that.

Personally, I've seen it all on a VFR. I've seen a supercharger and I've seen a turbocharger. I've seen a big bore kit and I've seen a nitrous kit. I've seen high dollar Ohlins rear suspensions, RC51 fork conversions, you name it. Sure, if you throw enough money at it, anything is possible. That goes without saying. However, without spending an exhorbitant amount of money, your VTEC simply can't come close to matching the Suzuki GXS-R 750's level of performance. If you think you can do it, then by all means go for it. I assure you we'd all be rooting for you. I know I would.

It would be cool if he could pull if off, though. :fing02:

Maybe he's gonna bore out the cylinders and put in some higher compression pistons, put in some radical cams, do some head work, etc. What's cool about that is it certainly sounds doable.

My goal is to improve the bike's performance to close to where it would be if it were receiving biennial updates to keep pace with the GSX-R750, which means losing weight, improving dynamics (braking and turning), and improving engine power and delivery.

I applaud your passion to conceptualize your idea and follow it through to fruition; however, in so doing, you're gonna have to shed about 100 lbs. off the bike and increase the engine's output by at least 30%. How do you intend to do this?

Complete de-link is about 10 pounds saved, right? He's probably dropped a pound or pound and a half with the change in front wheel. Good titanium exhaust could save 15, and completely removing the PAIR system & a little work with a hole cutter to open up the airbox could be a couple pounds. What are we up to, 30 pounds? There's that lighter weight forged rear wheel for the 5th & 6th gens out now that saves a couple pounds, and then... uhm... I guess there's a swingarm swap to the Ducati stuff that's been talked about that can save a couple pounds. So if he throws a cubic yard of cash at this thing he might hit 40 pounds of weight reduction. That's an admittedly highly optimistic estimate on my part. And probably outside the lines drawn for this specific thread so I'll stop now.

Removing the passenger footpeg assemblies, the chain guard, and centerstand might save another 15 lbs. He could also swap the steel sprockets for aluminum ones. Maybe he's gonna get CF bodywork all the way around. Maybe even fab an aluminum subframe.

My goal is to improve the bike's performance to close to where it would be if it were receiving biennial updates to keep pace with the GSX-R750, which means losing weight, improving dynamics (braking and turning), and improving engine power and delivery.

I applaud your passion to conceptualize your idea and follow it through to fruition; however, in so doing, you're gonna have to shed about 100 lbs. off the bike and increase the engine's output by at least 30%. How do you intend to do this?