Jemco jollies

[tz375]

After riding the Phat Trakka for a while with the 3 into 1 Strader exhaust on it I fitted a set of borrowed Jemcos last night. The brackets on 2 of three pipes were slightly out of place and 1 pipe leaks a little, but the biggest issue is the gear change.

Strader fits under the motor, so there's lots of room for a big left foot. The outer pair of Jemco pipes fit outside the frame rails so not much room and that resulted in a few missed up shifts.

The Strader is a mellow pipe that feels great around town. Tons of bottom end and mid range and the top end is adequate and that makes for a mellow fun ride. Jemcos on the other hand drop into a slight hole where the Strader is pulling strong and then they start to scream.

Even with stock but jetted BS40 carbs, it's now a bit of a top end monster and way faster than much else I've ridden in a long time. With almost 100 pounds less weight than stock to drag around and a screaming 50% more power at the top end, It will get me banned if I'm not careful.

For the street though, Strader 3 into 1 is probably more fun at a saner speed.

Next job is to fit a longer shift shaft or wider shift lever or make up some rear sets with GP shift pattern.

[Craig380]

Sounds like fun, and it's hard to beat that sensation when a stroker comes on the pipe

[Suzukidave]

Yep .. i have the same toe clearance problem with my yellow bike as we fitted the pipes also outside the frame . Time to put a torch to the shift lever and bend it out just a bit and put a bit of a S in it

[tz375]

I was looking for a spare lever to bend - or I may just weld up a new one. I missed a couple of relatively high RPM shifts and the tell tale suggests it was close to 5 digits as no load revs soared. That could prove expensive.

Maybe I should just go straight to an electronic shifter Pity they cost so much are so big and ugly. I want a teeny tiny thing that's more or less invisible and shifts instantly. My foot and hand by comparison are neither quick nor efficient.

OK, so it's back to the "ankle grinder" and gas axe again....

[Suzukidave]

They make those remote electronic shifters where all you see is a cable to the shifter , they hide the actuator under the seat http://www.holeshot.com/shifters/ps3.html" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false; but yikes they hit ya up for the kit

[tz375]

Nice item but just a touch outside the budget this week.

[Suzukidave]

You said they wouldnt allow the electric shifter when drag racing either . So it looks like the Jemco's will be the drag pipes ? Can you put up a picture of the PT with the Jemco's on her

[tz375]

I think that electric shifters are the same as air shifters and are OK to use, but they don't allow fully automatic shifters.

There's no way to drive an auto shifter with our prehistoric electrics I suspect. I haven't worked out how to launch this thing yet, let alone worry about shifts. All I know for sure is that I can afford to keep missing shifts with my big feet and a short shift lever. I found a spare shift lever this evening in the bottom of a box, so I'll chop off the foot part and weld on a longer one and then I'll grind some metal out of the lower face to allow it to fit closer to the pipe without denting it.

I am starting to understand why some of the old drag bikes I have pictures of have ugly long shift levers. It's all about functionality at a low price point. Kevin H has an air shifter, as do most racers, but this is just a street bike that I want to take down the strip for some fun - this isn't a new race career for me, but I can see how easy it would be to get sucked in.

Here's a pic

[oldjapanesebikes]

[pjmcburney]

Geez mate, you could have run the clutch cable under the tank .


Very nice, BTW.

[Suzukidave]

PT looks great with the Jemco's on

[jabcb]

How do the Omar/Jemco 3-into-1 exhausts compare to the Straders?

[tz375]

Thanks for the props guys.

I haven't seen a dyno chart so it's hard to know. Back in the day, Strader made the only three into one that was reported as making more power than stock with a 3 into 1, but I have not seen the data to support that claim.

I like certain aspects of the OMAR/Jemco 3 into 1 and would expect that it would be a great street pipe but no race pipe. It also has a much larger volume muffler and with any luck, that would be a little quieter than my modified Strader. Strader made at least three designs that we know of including a neat multi chambered baffle arrangement. Mine came with a more restrictive design and I changed that to an internal stinger/integrated absorbtion muffler that appears to make more power but isn't as quiet.

That clutch cable is a very heavy pull when routed under the tank, so I decided to leave it "raw".

The bike has a Trail-Tech Vapor speedo/tacho and it's so small that it's close to useless. I chose it because it's tiny and almost invisible, but it really needs to be replaced with something large line a snowmobile tacho - in your face. Maybe I'll get used to it and will learn to look at it, but for the moment I'm watching the Air:Fuel gauge which is connected to the data logger and to a wideband O2 sensor in the center pipe.

[oldjapanesebikes]

I forgot to ask when I was there Richard, but you are not using a surge tank for the rad at all with the relocated rad fill cap ?

[Blokhead]

Looks great, and also appears to be much lighter in weight!
Are the side covers real carbon fiber? What kind of rear shocks are those?