RS80 Naked

[Machinist]

After about 9 months of work it's finally done. This project started when a friend broke his stock crank and decided to go with a different motor (see http://www.apriliaforum.com/forums/s...d.php?t=219316), leaving me with a disassembled motor and a few other spare RS parts (frame, forks, seat). Slowly collected and/or machined the remaining parts into the following:

Frame:
-2000 rs50 anodized black
-handmade single-seat saddle support (4130 chromoly) with death spike
-clearly visible license plate to avoid police harassment

Motor:
-2003?
-malossi 80cc kit
-doppler endurance crank
-dellorto 21mm carb
-oil pump removed
-starter removed (push start)
-arrow exhaust

Electrical:
-Stock brake light
-LED turn signals (front mounts are temporary, still have to machine the permanents)
-mychron 3 digital readout: tach and cht, soon to add a coolant temp line
-single-beam headlight from suzuki dealership

Other:
-many many many small machined spacers and what nots (mostly turned on a lathe), including front wheel spacers, gas tank mounts, throttle and clutch spacers/extenders, random washers...that's all I can think of for now.

Most other parts not listed are stock and were collected from ebay, craigslist, af1, etc.

Pics aren't great, but here you go:


















Will

[RS_Patrick]

Verry nice job on that one.

I probably would bent the Exhoust up a little just past the expancion chamber and than down again a littl just infront of the silencer so it ends up just below the licence plate.

And i would have fitted a smaller front fairing and 2 little headlights.

Make a Custom Front Sprocket cover, and a Customn Chain protector might look cool also.

Might be nice to paint the engine and footrests etc black also, or atleast part of them.

[RonneBear]

That's one sexy bike =)
Nice work

[Dom.C]

Very nice indeed

[Owen.G]

I like her but i think you need to get a bigger headlight imo. Shes so far and dodgey looking from the front but other than that shes tidy. The pics are great.

[Machinist]

Yea I think I do need a bigger headlight. The only reason I used the one I did is I picked it up super cheap at a closeout sale. First I want to figure out some kind of small front fairing. Not sure if I should custom fab or use one off some random bike. I want to integrate the headlight, front fairing and turn signal mounts using machined aluminum fork clamps

[Machinist]

Verry nice job on that one.

I probably would bent the Exhoust up a little just past the expancion chamber and than down again a littl just infront of the silencer so it ends up just below the licence plate.

And i would have fitted a smaller front fairing and 2 little headlights.

Make a Custom Front Sprocket cover, and a Customn Chain protector might look cool also.

Might be nice to paint the engine and footrests etc black also, or atleast part of them.

I like the idea for the exhaust, but I just don't feel like messing around with it now. Maybe in the future.

I also have the front sprocket cover and rear fender/chain guard, just not installed yet.

The only reason I didn't paint the footrests black is because I didn't want to have to touch them up constantly from my shoes rubbing off the pain. I decided to just bead blast and clear coat them to break up all of the black that's already on the bike with a little contrast.

[Machinist]

Front fairing complete! I decided to stick with the headlight I had, for some reason I'm a bit attached...You'll also notice I'm running the stock coolant temp gauge. I have yet to buy the sensor to hookup to my computer, but sometime in the future.

[twinturba]

Now that is a sweet custom! I bet the bike is so much quicker with all of that weight taken off!

[RS_Patrick]

Accelerates faster for sure but top speed will be lower because of the poor aerodynamics, it has a pretty big impact on a bike like the RS50 even at 50mph, if you think its not a big difrence go down a straight road flat out with your kneeds tucked against the frame/tank, your elbows close to your boddy and your head behind the windshield, and see hoe fast it goes, than decelerate a little and sit up straight in a more comfortable position, and go flat out again and see how much difrence that makes.


But i really like this streetfighter conversion, hope it accelerates like crazy.
Nice front fairing, bit MadMax style.

[Machinist]

I haven't actually weighed it yet, so we'll see. I would agree with Patrick on the aerodynamics, although my biggest problem with top speed right now is the stock gear ratio (12:47)!

I like the mad max reference as well.

[RS_Patrick]

I got 12/47 on mine , goes like crazy to its topspeed of 60mph, just takes a few seconds to get there.
(73cc TP kit, 24mm Mikuni, Gianelli pipe, Race Crank, TP iCDI, custom upgraded clutch etc. etc.)

I wouldnt go for a high topspeed with yours, but aim for good acceleration with a nice speed, suits the bike style better i think.

[twinturba]

RS Patrick: Quicker = Accelerates faster, I appreciate your trying to teach me physics but we already have a scientist in our club :-)

Machinist: You should change the rear sprocket for a smaller aluminum one, maybe a 43. This will give you a little more top speed and reduce the rotating mass = win win. Most popular sprocket setup here in the US in 13/43 so if you change the rear and find you still want to sacrifice acceleration for top speed you can still order the 13 front later.

[RS_Patrick]

I use Alloy sprockets on my bike to reduce the weight, that cuts the weight even more, especaily if you would fit a smaller one, but there expensive and wear out a little faster.
(think i got a Mayse rear sprocket now) but basicly the difrence is so small you only notice it while racing on a track.
Other than that i would just change the Front Sprocket to 14 tooth or 15 tooth if you got a more serious street setup.
Than your able to do a quick change between front sprockets also if you want/need it to pull harder/go faster for a trip/ride, though it causes extra wear on chain and sprockets if you do that.

[Machinist]

Yea im leaning towards changing the front sprocket first because its very easy to do. I definitely want to change it though because 1st gear is barely good for 5mph...