Topic: GV1390's Trattoria "Racer" V2!

[540nova]

My MC reservoir. Decided to come up with that instead of using a regular hose with cap on top. Sinister902 turned it for me.

I can't quite picture what you're describing? That cylinder is your reservoir? For the front or rear brakes? If for the front, I'd be curious if it will hold sufficient volume to properly actuate your brakes. If for the rear, that's a bit more viable as its only actuation is to pull the drum rod.

Curious and mildly intrigued...

As opposed to this, which is all the rage these days






1974 CB450, 2006 CBR1000RR

[sinister902]

His neck angle and stem are stock, just the offset is different.

with respect to the rest of the frame it is unchanged, but not with respect to the level plane it travels on....



it's measured to the perpendicular of the surface the wheels ride on....so with the rear having 1.48" more tire outside diameter and the front having .29" less tire outside diameter, the angle with respect to perpendicular to the ground will be different than 27*

[FunJimmy]

with respect to the rest of the frame it is unchanged, but not with respect to the level plane it travels on....

it's measured to the perpendicular of the surface the wheels ride on....so with the rear having 1.48" more tire outside diameter and the front having .29" less tire outside diameter, the angle with respect to perpendicular to the ground will be different than 27*

It's obviously important to have a comprehensive understanding and respect for motorcycle geometry especially if you're building a competitive race chassis but this isn't a competitive race bike. The specifics mentioned above are viewed in isolation and do not take into consideration other aspects of the build. Primarily a reduction in fork offset. From your measurements the steering head angle will be reduced by approx. 1° which reduces trail. Trail is increased with a reduction in fork offset so one can easily offset the other but it's important to remember that frame geometry is a science based on compromises. Take a look at modern motorcycle specifications and you wil see that there isn't one perfect spec but many different approaches to the same end goal.

[GV1390]

Another tire is $60....I can afford it lol. When originally ordering tires, I wanted the meaty look out back on purpose......knowing that, I may need to go down a size eventually - really not a big deal. 130/80 would still be a taller diameter than the 110/90....which 110/90 would be 99% and 130/80 is 104%. This specific build will still out handle any local CB550/500 show motorcycle around a track even with the tires on it now and I have no problem showing that.

[sinister902]

stock tire sizes had 1.6% difference in diameter front to back, and 20% width difference front to back.... 110/90/18 up front and 130/80/18 out back is 1.5% and 18%.....super close!

[SOHC4 Cafe Racer Fan]

Have you taken it out for a spin yet, GV?  I think you were still working on the charging system and a few details, right?

[GV1390]

No spins yet, but surely soon! I will work on it this week when I get a moment...I just got back in town so work/school/martial arts/life takes first priority.

[sinister902]

Have you taken it out for a spin yet, GV?  I think you were still working on the charging system and a few details, right?

The antigravity battery has a standing voltage of 13.5v as it is, so it is really tough to say if the bike is charging or not

otherwise we need to get the tail sniffer on it and see where it's at on jetting before he takes it out for a spin to seat the rings. Very minor details left to iron out.

[GV1390]

Don, all goes well this week then this thing will see a track day before the season is over. Speaking of track time; your buddies KZ swapped CB is so damn awesome. Love that he tracks that jam maker.

[SOHC4 Cafe Racer Fan]

Don, all goes well this week then this thing will see a track day before the season is over. Speaking of track time; your buddies KZ swapped CB is so damn awesome. Love that he tracks that jam maker.

I rode it last year.  It weighs nothing and handles amazingly well. 

[SOHC4 Cafe Racer Fan]

Ok GV, get off you tuckus and get that bike completed.  If you get it done in the next couple of days, I think you could battle it out for the Upstate NY Beauty Contest.   

[GV1390]

You knew I was working on it tonight....



With that being said, I rode her down the street! Work at 6am so I'm reserving this spot for my correct geometry post.

[GV1390]

UPDATE:

In regards to geometry; the ground was measured to ensure it was flat. A magnetic angle gauge was used to measure neck angle, then fork length was measured, triple offset was measured and also front tire diameter resulting in 3.93 trail. Pretty darn close considering stock is 4.1 =) This (as suspected) will make the turn in more "nimble" hence why a damper was suggested. Math doesn't lie.

I also got the chance to ride this thing, finally! Everything charges as well but still has some areas that need buttoning up. One more solid days worth and she will be ready to go on the road!

[sinister902]

very late, very poor quality video of GV taking it out to the street last night.

[GV1390]

Does anyone else on here run a Cognito Moto triple?

Reason I ask; there is no room in the stem length to fit a dust cover on the top bearing. I installed a factory dust cover but then there are not enough threads to spin on the top triple main nut. It currently works how it should but I still rather have some sort of cover protecting my bearings even though its a pretty snug clearance under the top triple.

[slikwilli420]

Does anyone else on here run a Cognito Moto triple?

Reason I ask; there is no room in the stem length to fit a dust cover on the top bearing. I installed a factory dust cover but then there are not enough threads to spin on the top triple main nut. It currently works how it should but I still rather have some sort of cover protecting my bearings even though its a pretty snug clearance under the top triple.

I back bored my custom top tree so there was a very small gap and it was able to go down over the steering neck instead of using a dust seal. I suppose stuff can still sneak in there but I don't ride on a lot of dirt roads.

[rusty2078]

Sorry if I missed it, GV, but what do you have for a swingarm?

[SOHC4 Cafe Racer Fan]

We all knew it was coming. I just punched the ticket.  You've been nominated for BOTM.  Assuming it is seconded, we will have a nice battle of the cafes (including the Upstate NY guys) for September 2016 BOTM.

[GV1390]

We all knew it was coming. I just punched the ticket.  You've been nominated for BOTM.  Assuming it is seconded, we will have a nice battle of the cafes (including the Upstate NY guys) for September 2016 BOTM.

Thanks for the nomination Don, means a lot.

Can I still run for BOTM if my emblems aren't painted? I've been stuck on this dilemma for a bit of time now.

:sigh:

[GV1390]

Bump...

Some teaser pictures for now:









Got mostly everything done....have to order some new jets to swap in and also paint my tank emblems once I decide on what color to do. Pretty stoked though!

[FunJimmy]

Lookin great GV. Lovin the waistline.

[GV1390]

Lookin great GV. Lovin the waistline.

thanks man!

[GV1390]

Crazy to think this build started in this form:



Anyway; some updated pics:

Untitled by Ian Kley, on Flickr

Untitled by Ian Kley, on Flickr

Untitled by Ian Kley, on Flickr

Untitled by Ian Kley, on Flickr

Untitled by Ian Kley, on Flickr

Untitled by Ian Kley, on Flickr

Untitled by Ian Kley, on Flickr

[GV1390]

[Rookster]

Fantastic pics.!  I love the background out by the Skyway.  The bike looks great too.

Scott