XJ600n reserve switch and tank range

[mattfender666]

Hi guys if i fill up and run tillthe bike starts cutting out, then switch to reserve, nothing changes, a light in the tank shows its empty... Both plastic tubes inside the tank are attatched to the tap , could this be a problem with the tap seals/ diaphragm??

Also, i seem to be using a LOT of fuel, admittedly i dont hang around and i do use ful rpm range, but im using a full tank of fuel on 90 miles!!!

[ficedula]

[mattfender666]

Hi there thanks for replying the tank is definately empty when i switch to reserve :/ as for the tap being on the wrong way im not sure, as it turns to all 3 positions no problem at all, how would i go about ensuring it is on correctly? As it stands at the moment, down is on, middle is prime and up is reserve??

As for fuel consumption im not sure whats going on :/ i have just fitted a new chain and sprocket kit as the old set were knackered, im having other issues with the bike too which i geuss i will have to resolve first before i can get an accurate mpg reading. Heres to hoping the chain etc will help!!!

[Kickstart]

Hi

Might also be possible to reassemble the fuel tap incorrectly so that normal pickup is taken from the bottom of the tank.

My Divvy did about 45mpg in normal use (not that great on fuel), but still way better than you are getting.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[mattfender666]

[ficedula]

Your tap positions are the same as mine, so that's not the problem - but Kickstart's suggestion is possible; somebody might have reassembled it wrong so the on / reserve pickups are reversed?

[mattfender666]

Thanks for the advice everyone, i will fill her right up tomorrow and run her on reserve and see what happens. No signs of fuel leaking and the fuel level isnt going down when its parked up. Ive even sniffed my oil a few times a week just to make sure its not seeping past the valve seals, no smell of petrol.

Going to check oil, plugs , choke, before i fill up incase anything is wrong.

Has anyone experienced clunky gear changes on this bike? Have the common clutch basket rattle but cant seem to get smooth gear changes on her :\

[ficedula]

Don't know if it's a common Divvy trait, but mine certainly appreciates oil changes - the gear changes start to get a bit clunky as I approach the service interval, and become a bit smoother once I drop the oil and put fresh in. Could be worth changing the oil if you've got a clunky gear change and don't know how old the oil is.
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Bike history: YBR125 -> XJ600

[Kickstart]

Hi

Gearchange getting nasty was also a sign with mine that the clutch thrust bearing was on its last legs.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[mattfender666]

[Kickstart]

Hi

I just got them from Yamaha. They are not difficult to change (although Haynes tells you to just lube it with engine oil, the Yamaha manual says to use molybendium disulfide grease).

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[bodger]

Hi mattfender666

Keiths right, the clutch does get temperamental when the thrust bearing is worn. Although at the best of times the gearchange is not the best.
If you want a new bearing, SIMPLY BEARINGS on the internet sell them and the thrust washers.

Needle Roller Cage and Roller Assembly 15x28x2mm Prod no.. AXK1528
Thrust Washer Series AS 15x28x1 mm.. Prod no. AS1528

About £5 covers it.
Good luck

PS I get about 60 mpg from a 600 divvy

[mattfender666]

Evening all and a huge huge thanks to everyone for their helpful words of wisdom!!!
I took her out for a good ride today after filling her up and ive managed to ride 70 miles and have used just under a quarter tank of fuel, great success!!! I geuss the old knackered chain and cogs were killing the mpg!!! Thanks for the info on the thrust bearing dudes , i will order one asap, along with a new clutch cover gasket and possibly some new plates and springs!!

Again huge thanks guys