Couple of annoying issues 2004 GSX250

[biketimus_prime]

Hey Imdying,

It worked a treat and everything happened exactly as you said it would. The clutch lever feels so much better now! I had to turn the flat head screw almost 2 turns to feel any resistance. I've got a decent amount of free play now too. It all works great. Thank you for taking the time to walk me through it and write all that up. I really appreciate it, you're a legend

[imdying]

You sound like you're new to this/young, which probably means you don't have money to waste. Been there, you're more than welcome.

[biketimus_prime]

Did an oil change last night and the RPM at 100kph has now dropped from around 8500 to just a smidge over 8000, engine revs a lot smoother and gears change and engage so much more easier. The oil was Motul 10w-40 5100 with 7000km that I removed and put in Castrol Power GPS 1. What a difference! Must be so much more noticeable because it's a smaller engine?

[imdying]

That is impossible. The gearing between the crankshaft (RPM), the gearbox (all fixed teeth) and the chain and sprockets (also a fixed ratio) and the rear wheel, is constant.

Noticing a change of oil is pretty bad news, a sign of neglect even. Never should the oil become so rooted that you can notice an oil change. Now it's your bike, make sure you look after it, because you can safely assume the last guy did not.

Beware the placebo effect, it is very very powerful.

[biketimus_prime]

That is impossible. The gearing between the crankshaft (RPM), the gearbox (all fixed teeth) and the chain and sprockets (also a fixed ratio) and the rear wheel, is constant.

Noticing a change of oil is pretty bad news, a sign of neglect even. Never should the oil become so rooted that you can notice an oil change. Now it's your bike, make sure you look after it, because you can safely assume the last guy did not.

Beware the placebo effect, it is very very powerful.

I was wondering how the hell that could happen with all the drivetrain being constant, do you reckon my tachometer is out then? Because honestly when I first got the bike it was doing 9000 RPM at 100kph and now, just a bit over 8000. Only thing I can think of is maybe is that the clutch was slipping or something due to the old oil. The service with motul oil and new filter was done by motorcycle doctors around 7000km ago.

[imdying]

Nah, it's probably all in your mind. Or your tyre is going flat

I wouldn't worry about it, stress will only kill you. Just keep changing the oil and eyeing up trademe.

[biketimus_prime]

Nah, it's probably all in your mind. Or your tyre is going flat

I wouldn't worry about it, stress will only kill you. Just keep changing the oil and eyeing up trademe.

Haha no worries then I'll just enjoy the ride

[sharp2183]

Initial KB antics aside, this must be one of the better threads on here. Really informative for someone asking for help

Speedo variance is possible but as imdying says, very unlikely. Where is the speedo pickup? Front wheel or on the front sprocket? Changed your tyres lately? Changed sprockets? But most likely in your head.

[FJRider]

I was wondering how the hell that could happen with all the drivetrain being constant, do you reckon my tachometer is out then? Because honestly when I first got the bike it was doing 9000 RPM at 100kph and now, just a bit over 8000. Only thing I can think of is maybe is that the clutch was slipping or something due to the old oil. The service with motul oil and new filter was done by motorcycle doctors around 7000km ago.

Maybe ... your speedo is not (never was .. ??) accurate.

and ...

Can you guarantee the accuracy of your rev counter .... ??? Is it cable driven or electronic .... ??

You seem to put a great deal of (unwarranted .. ??) faith in both being accurate.

[biketimus_prime]

Initial KB antics aside, this must be one of the better threads on here. Really informative for someone asking for help

Speedo variance is possible but as imdying says, very unlikely. Where is the speedo pickup? Front wheel or on the front sprocket? Changed your tyres lately? Changed sprockets? But most likely in your head.

I'm not sure where the speedo pickup is. I'll have a look around and see if I can find it. Haven't changed sprockets and as far as I know it's all as it was from factory.

Maybe ... your speedo is not (never was .. ??) accurate.

and ...

Can you guarantee the accuracy of your rev counter .... ??? Is it cable driven or electronic .... ??

You seem to put a great deal of (unwarranted .. ??) faith in both being accurate.

Yeah I think I am putting too much faith in the speedo and tacho. Silly old pieces of equipment! Even my car's tacho used to bounce around every now and then.

[ducatilover]

You're imagining it bro

[biketimus_prime]

I've gone insane

[ducatilover]

Good. Now start modifying it then you'll be screwed.

[biketimus_prime]

Haha I won't modify this little 250. I want an R1 or R6 one day, but I suppose most people who start riding will say that.
Also my speedo sensor goes off the front wheel

Having an intermittent issue with the headlights. Bulb goes on and off and seems to be when I wiggle the wires. Mo' riding mo' problems

[biketimus_prime]

Maaaan WTF both filaments on both headlight bulbs are fine but they won't power up for low beam either side unless I give them a small tap, one looks like it's gonna light up but then stops (It goes a bit red then dies out.).
The other, if I put it back in it's housing will turn off unless I wiggle it around, it'll stay on for a bit then die out.
If I flip around the contacts the high beam filament lights up just fine. This is the case for both bulb holders, both sides of the bike. Same deal with high beam switch turned on, the low beam filament won't light up (if I flip the contacts) but the high beam does.

Traced all the wires everywhere etc and it appears to be all fine, both contacts to the bulb holder give the right voltages for each contact when tested with the multimeter. So I'm putting it down to a low beam filament issue, gonna buy some new ones and see what happens.

On the left side, the small position bulb had a loose contact, the earth wire contact had come loose. When I put the headlight bulb holder in place, the small bulb would come on but not otherwise (earthing through the housing instead of wire?). Sorted that and the bulb works with the holder taken out.

I reckon this stuff happens mainly because of vibrations around the front area?