Pinned So what have you done to your bike today?

Oh bugger!!!!!!
There goes my excuse to my wife about getting lost as a means of explaining my lengthy rides.

 

Quickshifters can be an absolute joy to use when set up correctly. Particularly when riding hard.
They can be a bit of a pain when you do lazy, early shifts though.

 

Cool. The blip on down shifts is great in a car. Particularly one where you have the steering column going between your feet (so can not left foot brake) and impossible to do the heel and toe blip thing while braking due to limited room.

 

are those front discs ventilated? if they are then they are off a cb1100r and rare.

 

cb100r discs then and i have no idea where you would get them new. cbx is 81/82 model where mine is a 79. worth a motza if original. front forks are interesting as they were machined on the inside to save weight and under severe braking they bend in towards the motor.top cruiser but were not happy on the racetrack.

 

no oil over pneumatic forks on mine so i think an add on.cb11oor were a much better bike for racing but honda went back to a 4 cylinder motor.

 

Getting the old girl ready for this weekend's Bike Mayhem at HPR (Heathcote Park Raceway). The engine is getting tired and I will try to pull it down over Winter; new rings might be all it needs.



I ran out of time to get the quickshifter connected and working, so I will be running her with normal gear change and a few changes from my last outing (Gunnedah - August 2022). I ran a 9.27 at the Gunnedah 1/8 mile meeting with 13T/48T gearing, but since HPR is 1/4 mile I have gone back to standard 14T/48T. I've also started to experiment with ride height and rear shock settings. I've dropped the back a little and I am running the rear shock on the softest setting. I will take the bike for a quick spin around the block tomorrow just to check everything is okay before loading her into the van. It won't be as much fun as normal this weekend as the forecast is for 37 degrees and northerly winds of 30-45kph...great.

 

Bike all set for the weekend's racing and the drag strip cancels the event. Probably for the best given the conditions. I use my wife's FB account and the HPR event coordinator showed me the alert/notification they sent out to tell everyone the event was cancelled. Can someone tell me how to configure FB so that these alerts/notifications come through to me (my wife)?

I took the bike for a couple of quick laps around the block and all seemed fine with the new rear-end setup. I think long periods of sitting around doing nothing aren't great for this engine. She runs poorly when first brought out of hibernation, but seems to run better the more laps I put on her during a weekend.

 

@thebeefsalad did you get those carbies sorted? The Buell seems like it might be rich on idle. Tuning should be done with the airbox on the assembled state.

The crf150r had a FCR-type of carby, they are rather finicky, so +4 might be too much. On both, fuel float lever can make a difference, too. Too high of a fuel level doesn't allow enough air in the emulsion tube stage. Air jets are another thing to check.

 

So, I have been riding 2-smokers in MX last year, starting with a YZ125, then deciding that I wasn't fast enough for a 125, went to a YZ250 - the one that took a few years to get done. The 250 has plenty of power, actually, I started thinking too much. I had a crash (ok, a few, but one bigger crash) at the end of last year that made me reset the suspension settings (made a big difference) and a matter let me ride his 350SX (after witnessing my big off). The difference between 2T and 4T is quite noticeable. I decided to get a 250f, and picked up a WR250F cheap, got it running, replaced the rear shock, a few other things and been riding it a bit. Yesterday I ride the WR, then the YZ. Being a WR, the flywheel is heavier, but cams are YZ 250F and carby might need a little tuning, but it is so much tamer than the 2T. Got on the YZ and the front wheel comes up so easy, accelerates at blip of throttle so sharply. The WR is dull in the bottom revs, but better with the revs up - ride it like a 125 smoker! I'm too old for 2-stroke: they need riding hard and intentionally. My mate got the new 350 and the salesman called it "the vets bike." Not as brutal as a 450, easier than a 250.

 

Not sure what all I've mentioned here but I got the yz250f carb sorted after replacing the hot-start nut that was in bad shape before i got ahold of it (and broke it the rest of the way).

Buell needed intake manifold boot so the crf150r is back in the garage. Got tired of pushing it with a flat rear tire, so I pinched the new tube during install.

I've so far tried to avoid changing anything but the idle mixture screw settings on these bikes, as they should have been setup correctly. Insert "i know better" eyeroll here. This one got the mid-body gasket replaced, it was obvious someone tried to use carb cleaner on it at some point once I had the carb open. Going to document current float level, change it a bit and see if I can sort it out without changing jets. I really really really dont want to chase down jets for this. Owner of the bike doesn't understand the complexity of jettings an FCR, nor the expense behind it. She wants to sell it as is "if it runs". I keep explaining to her that it could be a ticking time bomb if its running as lean as I suspect it is. She doesn't care "guess we will sell it without a warranty." That's great since she won't be in the moto community anymore, I on the other hand...

 

I was thoroughly confused when posting jet #s apparently. Idle jet is 42 which is supposed to be stock on these bikes. bumped it up a few numbers and it acts the same. Pulled it out to bench test it a bit and realized the accelerator pump is firing as soon as the throttle is twisted, before the slide has lifted enough to let the gas enter the intake. Also discovered the float needle has lost it's spring so I bet that's part of the problem as well. I used to be in the boat of "at least you can fix a carb on the side of the road", but I can say the only time I've done such a thing it was actually the gas tank vent that was the problem, not the carb itself. FI is the way of the future, and I'm all for it once I can afford the tooling

Local stealership sold the owner of the bike the wrong sized tube, twice. First it was a 14", then a 16" that was too small. Was convinced I pinched the tube, until I pulled the old one out and theres no pinch mark at the split. Seems to be an oddball size and ended up going with a 400-455 instead of the 360-410 the specs call for. 1st shop "would have them in a month". 2nd shop didn't make an estimate. 3rd shop is working on closing its doors so I got a deal.

 

More exhausting fiddling

 

@Gen I like the air gap headers. Is that some new form of scavenging technology that I haven't caught up on yet.
Peter.