The Slick is On

[lecroy]

Many questions.....

The tire looks like a nice fit under there.

Did you get the chain on it yet? If so, how much room did you end up with?

The strut you show looks like a strap. I figured because the caliper was not mounted that it's not done and your still playing around. Or, is this what your planning to use? Is there a better side picture of it?

Why not convert to a mono-shock and skip the struts and the wheelie bar? Maybe you could just fit your engine into a newer 750 mono-shock frame.

It looks like the tire has way too much air pressure. Did you have them tube it? If you can, I would run no tube if possible. If the tire does slip then at least it won't tear out the stem.

Do you have a 1/4 mile track near you that you could run at? It would be very interesting to hear what kinds of E/Ts you could get out of it compared with some of the local guys. Most of them are just running stock setups, but still quite fast.

Looking forward to the 6.75 pass! Get a camera to take some action shots for us!!

 

[Anonymous]

Hey Jake,, is that the stock brake caliper on there. and does it really fit without any modifications to it for the stock brake rotor for that year rim.

I have an 86 Gsxr rim(4 inches) that i am about to fit into a stock 81 gs1100 swingarm and want to retain the rear brakes just use the rear rotor from the 86 and want know if i have to modify anything.

 

[RacingJake]

Many questions..... Not a problem

The tire looks like a nice fit under there. Thanks

Did you get the chain on it yet? If so, how much room did you end up with? Yeap got the 630 chain on and the only problem is the chain touches the frame below the swingarm. Going to milled down the counter sprocket spacer about 3/16 to solve that.

The strut you show looks like a strap. Nope it 1"x1" angle steel from Lowes, cost about 6 bucks I figured because the caliper was not mounted that it's not done and your still playing around. Or, is this what your planning to use? Yeap Is there a better side picture of it? Go to my WWW button and there's a side pic of the bike with the shorter 1"x1"struts

Why not convert to a mono-shock and skip the struts and the wheelie bar? I cut the mono mount off so it would'nt hit the battery tray Maybe you could just fit your engine into a newer 750 mono-shock frame. I like the Rat Bike look

It looks like the tire has way too much air pressure. I got 20 psi in it now, wanted to see if it would fit Did you have them tube it? no tube If you can, I would run no tube if possible. If the tire does slip then at least it won't tear out the stem. I like that

Do you have a 1/4 mile track near you that you could run at? It would be very interesting to hear what kinds of E/Ts you could get out of it compared with some of the local guys. Most of them are just running stock setups, but still quite fast. I think the closes one is in Dallas/Fort Worth about 3 hours from me. One day I will go to a 1/4 track.

Looking forward to the 6.75 pass! Goal is to get 6.50 Get a camera to take some action shots for us!! Working on that one

[/quote]

 

[RacingJake]

Hey Jake,, is that the stock brake caliper on there. and does it really fit without any modifications to it for the stock brake rotor for that year rim.

I have an 86 Gsxr rim(4 inches) that i am about to fit into a stock 81 gs1100 swingarm and want to retain the rear brakes just use the rear rotor from the 86 and want know if i have to modify anything.

I'm looking for a smaller caliper mount to bring the GS caliper closer to the axle sence the rotor on the 92 rim is smaller. Don't know if the bolt holes will line up so I may just get a 92 caliper and mount assy. The rotor goes about haft way into the brake pucks, not a problem for me sence I don't used my rear brake anyway when drag racing but on a street bike I would'nt hit the road until it was right. I can't use my GS rotor cause the 92 rim has 5 bolts as compared to the GS 6 bolts. You may have to play around with axle spacers, add/remove depending on how wide the rim is. I'm not going to use the caliper torque bar cause I'm going to mount it to the inside of the swingarm. I was using the oem bar bolted to the top right shock mount and had to bend the bar to line it up with the caliper.

Is the rotor on the 86 the same size as the GS one?

If you had a completed wheel, caliper assy with spacers, sure would cut down on all the hassle trying to piece it together.

Is'nt Drag Racing fun

 

[lecroy]

20PSI, wow!! What do they normally run at?

Crap, 3 hours to the closest track. I understand the problem. I thought you just liked the short track for some reason. 6.50 would be great to see. That's about one second off my old street bike. Is there any weight you can shave off that thing?

 

[Anonymous]

I would say 20 PSI is too much, make sure the whole width of the tire makes contact after a quick burnout.

I run 12 PSI in mine +/- 2 psi right now (5.5X18), and back in the 70's, I had a laydown (that is what we called them back then) dragbike with a car tire in the back (8X15) and I ran between 6-8 psi on that one and I had sheetmetal screws around the rim to keep the tire from slipping.

Good luck and keep us informed. Take pictures at the track too!

I'll be racing this Saturday myself.

God Bless!

phil

 

[RacingJake]

20PSI, wow!! What do they normally run at?

Crap, 3 hours to the closest track. I understand the problem. I thought you just liked the short track for some reason. 6.50 would be great to see. That's about one second off my old street bike. Is there any weight you can shave off that thing?

I'm going to run what Phil is, about 12 psi to start with.

The only thing that come's to mind is a start cart and removing the starter and clutch assy to save weight.

 

[first timer]

where is the all important burn out picture, i want to see some smoke :twisted: :twisted:

-ryan

 

[cbxchris]

Jake the removal of the stater and electrical system will help you a great deal. Remember to get the correct nut for your crankshaft end. I always like the aluminum starter nuts from kosman the best. Jale when the coins allow check around for the swingarm that has the double pivots on both sides. It will make a great deal of difference in your down track stability. Then you can run adjustablr struts and have wheelie bar connections all ready to go. Again kosman is hard to beat. But there are several others that do the job cheaper. I built my own starters out of chrysler starters and welded the 1 1/8 nut on the bendix myself. The trick little starters are nice but you don`t really have to have them. Go to a welding shop and get your cables and connectors. Carts are easy to build.

 

[lecroy]

On my old GS I run 8 PSI max. Normal is about 6.

If you want to keep the electric starter and shed a few pounds, no problem. If you pull the generator off, you can see the magnet is held on with 8 or so rivets. Take the unit to your local machine shop and have them cut off the magnet. Punch out the ould rivets and remove the stator and rectifier/regulator. Note that the magnet will take up about 1/2 the thickness of the mount. I would use three nuts on the front of the plate to held the starter clutch. Make sure to seal the hole for the stator wires when you put it back together. Simple change and it's worth a few pounds. The battery should be more than enough to run the bike for a day (well maybe not as many passes as you make in a day ).

If you like the Rat look, I'm sure that we could get out a torch and welder and really pull off some pounds it you want to have some fun.

If you want a few pictures let me know and I will post.

 

[RacingJake]

On my old GS I run 8 PSI max. Normal is about 6.

I think the tire will spin on the rim at 6 or even 12, but i'll give it a try.
If you like the Rat look, I'm sure that we could get out a torch and welder and really pull off some pounds it you want to have some fun.

If you want a few pictures let me know and I will post.
Thanks Lecroy go ahead and post a few, may give me a few ideas.

Thanks Jake

 

[Richie]

yeah i run 8psi with mine 70" wheelbase, same wheel and tire as you have jake...later, Richie

 

[lecroy]

Jake,

No problem. I added a few more pictures to my site that show how the starter was changed. Just go the the bottom.

http://dickey.no-ip.org/esd3.html

Saves about 4 pounds total. But the charging system also adds a load and with magnet is a rotational weight so you will gain a lot more than the 4 pounds. I would try and find a junked one if you can and maybe sell your good parts to help cover your racing costs. Just let me know if you have any questions.



I tuned up my old GS the other day and drove it today. It's running good so I may take it to the local track this Friday to see what kind of times I can get. Seems like when it was running the mid 7's in the 1/8, it was running high 11's in the 1/4. It's been about 14 years from the last time I raced it. I put a new transmission in it when I rebuilt it so it should hold up just fine. I'm thinking I would need to spray in order to catch you.

 

[RacingJake]

Come summer I'd like to remove the magnets and keep the onboard starter sence I'm already running a total loss system now.

I bet that old gal will come back to life after a few runs. If it's like mine the more you run it the better it gets.

Good Luck

 

[lecroy]

Well Jake, I took the old girl down to the track today. I had forgot how much fun it was to drive.

Fastest 1/4 114.5 MPH
Quickest 1/4 11.885

Fastest 1/8 94.34 MPH
Quickest 1/8 7.565

The 1/8 MPH was all within 1 MPH. The 1/4 runs fell around 12.0. I tried keeping it in third but that really blew the top end (108MPH). My reaction times on it were poor at best. My best was a .593 (0.093) which is nothing to write home about. That skinny tire was all over the place. I got it to hook once and cut a 0.430 light with the tire a few feet in the air. That's when I got the 11.88.

I was the slowest bike there I think out of a pack of 20 or so, but it got a lot of compliments for being so old and in such nice condition. I don't think they pay out anything for that.

 

[RacingJake]

As long as you had some fun Lecroy that's all that matter. A little nitrous might just wake up them dudes and tell them you mean business.

Tonight I found out my clutch did'nt like that wide slick. It started to slip in 2 and 3 gear, just had to back out of the throttle and let it hookup again. I guess it was about time it wore out. Best time was a few 7.10's and that was it. Best part of the night was when I was doing a burnout and I let the bike roll a few feet and that slick grab some traction and the front end of the bike came up fast and hard, so fast my left hand came off the handle bars and I was doing a one handed wheelie right towards the water pit guy, scared the shit out of him and I thought I was a goner too. Can't wait to get the bars on too to prevent that from happening again.

Best part the slick worked out great and it's a strange feeling making turns with that wide tire. Feels like the bike won't fall over and you really have to force it to make those turns, kinda fun.

Ordered new plates and springs so by next week I should be good to go. Will see if I can reach 6.75 or better next time.

Take Care

 

[Hoomgar]

lecroy, check your GSR inbox buddy. There has been a reply to your PM in there since the 27th of last month that you have not picked up yet

Maybe you want to turn on the feature that gives you a message when you get a PM. I like that, that way they don't sit for weeks unreceived.

 

[rosco15]

I took my starter to a machine ship and they put it on a lathe and cut the magnets off for me. I was agraid to remove the bottom part of the magnet assembly when I saw part of the threads for the starter are in there. I guess lecroy is proof that it works. I run 8.5 psi in my slick. A look at the tire after the run shows that to be the most even wear. I was 225 last year. And on the subject of riding with the slick. I ride mine like a 3 wheeler. counter steering will get you killed. if you want to turn right. shift your weight to the right, lean the bike to the left, and pull back on the right bar. When you lean to the left the tire is up on the left edge and will push the bike to the right. pup had a great article on riding a car tire bike online. A small tire is the same principle just not as drastic. Here is the url. http://www.stripbike.com/chassis1123.html

 

[lecroy]

Better the clutch plates wear than other things!! Real good you didn't kill the starter guy!!

It was a LOT of fun. Thinking to go back on Sunday with a few friends. Not sure if I'm going to run or not. Maybe just shoot some video.


Mark / Ryan
Sorry about the email

 

[RacingJake]

Thanks Ryan for the link

So to turn left I put more pressure on my right footpeg and vise-versa. The more pressure on the peg the faster it will turn or go in the other direction. And you do the same thing when the bike is on the bars to keep it going straight. I learn something new everyday around here....Thanks

I guess I won't be doing anymore SuperBike leans.