Jemco jollies

[tz375]

Oldjapanesebikes,
Correct, no surge tank or other filler cap related extraneous parts.

Blockhead
It's about 90 pounds lighter than stock. Stock OEM exhausts are big part of that weight reduction.

Rear shocks are good looking - who knows how well they work - cheap - Ebay shocks. At the moment, the front end is still pretty stiff so it masks any rear end shortcomings. Swingarm was changed to needle rollers to get rid of some of the rear end flex.

Side covers are two or three (I can't remember) of carbon fiber in an West systems epoxy resin. I was going to make a mold from modified stock covers and in the end, I just wrapped the covers and then pulled the molded parts off. They are moved forwards about 3-4 inches and are probably 2 inches narrower on each side. They weigh nothing - but stock plastic covers are not very heavy either. The seat base is C/F as well and so is the small box between the fork legs that houses the electrical connections up front.

I have a C/F front fender (a prezzie from an admirer) that I must fit soon. Even the slightest dirt or moisture on the road and it's everywhere.

[Suzukidave]

The bike has a Trail-Tech Vapor speedo/tacho and it's so small that it's close to useless.

I know what you mean Richard i have a small dash type like yours on the yellow GTXR and it is just about useless to me as i cannot see it and there is no night light unless you push a small button and then it only stays on for a few seconds , thats why i was quick to put in extra $$$ for the dash on the injected project bike .

[oldjapanesebikes]

Oldjapanesebikes,
Correct, no surge tank or other filler cap related extraneous parts.

Thanks Richard - and just out of curiosity, where did the tank/rad level balance out at ? Likely about an inch down from the fill neck or so ? I'm thinking of trying something similar, hence the question.

[tz375]

Good question Ian.

The issue there is the upper radiator hose is actually quite high compared to the top of the radiator and a stock radiator curves down at the edges. Combined, that means that the filler cap is lower than it needs to ideally be.

I put the bike on the side stand to tilt it away from the filler neck and then fill it. That way the filler neck is the highest point.

An aftermarket square radiator would be slightly higher and may be enough. It's not a problem when running the bike, but it adds another complication to checking fluids on a run.

[tz375]

The bike has a Trail-Tech Vapor speedo/tacho and it's so small that it's close to useless.

I know what you mean Richard i have a small dash type like yours on the yellow GTXR and it is just about useless to me as i cannot see it and there is no night light unless you push a small button and then it only stays on for a few seconds , that's why i was quick to put in extra $$$ for the dash on the injected project bike .

At the drag strip last night I found that I was shifting by feel and ignored the shift light (that needed to be re-set for these pipes) and tacho. When I missed a shift into 4th I didn't dare look but I checked it this morning and it says that max rpm was 10,950.

It was only momentary but at that rate we'll be seeing rods outside soon. I should probably have a race set up that's plug and play with a decent tacho and shift light so I can see it. I have a couple of tacho options for our race bikes that might work but I really want to fit the huge Polaris tacho that works off AC. It counts pulses (ripples) in the alternator output rather than CDI unit spark trigger pulses

BTW, the Trail Tech does have battery (bike) powered backlighting and that helps - but only if you look

I also had a quick look at the drive chain and it is badly stretched already. I need to check that out and see what's up. It may be something (like a wheel) moved, so I need to check it before something untoward happens.

[Craig380]

I also had a quick look at the drive chain and it is badly stretched already. I need to check that out and see what's up. It may be something (like a wheel) moved, so I need to check it before something untoward happens.

heh, that's in the fine tradition of hot Suzi 750 triples In the documentary about Barry Sheene's ill-fated 1975 Daytona trip, all the TR750s suffered massive chain stretching. Suzi had fitted a trials-type jockey-wheel tensioner to ameliorate the problem but it didn't help.

Apparently Barry's rear wheel lock-up happened in practice because the tyre overheated, the rubber started coming away from the carcass and jammed against the tensioner.

Lansivouri's chain was jumping teeth on the sprockets during the race, eventually causing him to bin it, too.

Best check it before tradition catches up!

[Suzukidave]

I wonder if a couple of solid struts you could put in . in place of the shocks while dragging .. to avoid the chain stretching due to the swingarm swinging ?

[tz375]

I could, but that's not legal for the class I need to run in, and I'm just there for laughs. Besides, the shocks on it now are like struts anyway.

[Suzukidave]

Besides, the shocks on it now are like struts anyway.

[tz375]

The guy in front is on a Kawasaki ZX14R and we staged together. He let me go and started off "slowly" and when he passed me it was like a rocket ship went by. My speed around 100 per - his 144 and he was just playing around. Just as well there's no doors on a GT750 or else they would have been blown off.

And just when I thought I was going fast....



Modern bikes are quite simply amazing. There is no comparison.

[oldjapanesebikes]

The guy in front is on a Kawasaki ZX14R and we staged together. He let me go and started off "slowly" and when he passed me it was like a rocket ship went by. My speed around 100 per - his 144 and he was just playing around. Just as well there's no doors on a GT750 or else they would have been blown off.

Just a minute there - doesn't the other bike have something like twice the cubes and perhaps close to three times the horsepower ? Hardly seems sporting

[tz375]

1400cc, 180 HP, traction control, EFI, autopilot, self landing, missile control....More power and computers than the lunar orbiter it seems to me. Incredible technology that's available to mere mortals.

Fair fight? No. Fun? Yes.

[D&D CHASSIS]

Richard , are you using the clutch for shifting? What gear were you in going thru the traps?

[tz375]

6th.

No. It was 4 1/2th ie into fifth but only just, so that tells me I'm geared too high for the meager HP it's making. I thought I had a spare 50tooth here somewhere but have not located it yet.

No clutch but a pretty long kill time with throttle off and then snapped back to 100%. It felt like a fast shift but it's all wasted time and is obvious on the datalogger.

[D&D CHASSIS]

No clutch but a pretty long kill time with throttle off and then snapped back to 100%. It felt like a fast shift but it's all wasted time and is obvious on the datalogger.

Lets remember this is just a "fun" bike, so you`re playing the cards you`re dealt........
The shifter Dave had listed is legal to use....

What are you geared?