XR650r owners' thread

[dino3310]

the XR600 has a auto on the cam which can be a pain at times(hard to find TDC), upgraded cams like hotcams etc dont have them and without the auto on the 600 you NEED the manual decomp, The 650 seems a lot easier to kick over but then there a total different donkey

[madmartin]

there's some kinda auto anti kick back thingy on the 650 isn't there?

was gonna look at my manual, but it's dark and cold outside

[dino3310]

yeah i think so mate, like the 600 only a more modern set up. after seeing carey start his 650 a few times it looks like he's kicking a CRF over, easy peasy

[XRJohnny]

As old hands with trail bikes (early '70s) we all learnt a trick when we ran out of gas.
There was always a little bit of fuel left on the other side of the tank from the fuel tap.
We used to lay down the bike on the tap side, so any fuel trapped in the low part on the other side would flow over into the tap side of the tank.
Depending on the model of bike, we got up to 10Km of precious extra fuel, which was always enough to get to a supply.


The STANDARD tank on the XR650R is probably the WORST offender of trapped fuel that I have yet come across.
On the ''other side'' resides 1.5 litres of trapped fuel !
The normal reserve capacity measures 1.2 litres.
This is where the Average rider would ''run out''.
Unknown to him there is still even more ''reserve, reserve'' left at his disposal.

I realise the majority of you would know this already.....sweet, but many mature riders I have have spoken with in recent years, have not had this basic grounding.
If this information helps anyone at any time to extricate themselves from a situation it is worth the post.

Thanks Guys....PIG on

I will be putting this post up on USA sites too, as our Pigs are always being slated for small fuel range.
I have never found any mention of this peculiarity on their sites.


Photos showing volumes above.
These are 1.5L bottles.
Clear Bottle contains Reserve....1.2 L
Green bottle contains LHS 'dregs'.......1'5L

[dino3310]

1.5l Faaaark

[dino3310]

this poor fella just cant get it up

[madmartin]

As old hands with trail bikes (early '70s) we all learnt a trick when we ran out of gas.
There was always a little bit of fuel left on the other side of the tank from the fuel tap.
We used to lay down the bike on the tap side, so any fuel trapped in the low part on the other side would flow over into the tap side of the tank.
Depending on the model of bike, we got up to 10Km of precious extra fuel, which was always enough to get to a supply.


The STANDARD tank on the XR650R is probably the WORST offender of trapped fuel that I have yet come across.
On the ''other side'' resides 1.5 litres of trapped fuel !
The normal reserve capacity measures 1.2 litres.
This is where the Average rider would ''run out''.
Unknown to him there is still even more ''reserve, reserve'' left at his disposal.

I realise the majority of you would know this already.....sweet, but many mature riders I have have spoken with in recent years, have not had this basic grounding.
If this information helps anyone at any time to extricate themselves from a situation it is worth the post.

Thanks Guys....PIG on

I will be putting this post up on USA sites too, as our Pigs are always being slated for small fuel range.
I have never found any mention of this peculiarity on their sites.


Photos showing volumes above.
These are 1.5L bottles.
Clear Bottle contains Reserve....1.2 L
Green bottle contains LHS 'dregs'.......1'5L

I've only ever got mine about 500m with this method, needing reserve usually means needing to walk...

[TINA RAY]

I've only ever got mine about 500m with this method, needing reserve usually means needing to walk...

So what is different with your bike ?

Has the main fuel pipe on the tap (inside the tank) been cut down ?

[madmartin]

yeah i'd say, still the fuel range is a bit of a joke, hence the 25litre safari monster

[dino3310]

chuck this bugga on and you would only need fueling once a month http://www.dual-star.com/index2/Bran...ly%20tanks.htm

[mattsdakar]

chuck this bugga on and you would only need fueling once a month http://www.dual-star.com/index2/Bran...ly%20tanks.htm

I have one of these 23ltr tanks on my XR, its great, lowers the bikes centre of gravity and I can get about 330km out of a tank. Never seen the rare tanks before, they look great, I really like that rally look, unfortunately they are well out of the budget

[madmartin]

feels bloody unnatural tho, the "supertanker"

[TINA RAY]

In the interests of fuel mileage, I removed the fuel bowl and unscrewed the main jet, which was a 175.

Calif spec ran a 125, so I soldered up the 175 and stuck a 1.25mm drill bit through.


Started, ran and revved ok, in the shed .

Test ride today to verify running.


Incidentally, I got 100Km till I hit Reserve, on Sunday.
Am running the tank dry in two stages to check range.



UPDATE;

Righto, 132KM.....tip bike over, then ran out again at 160.1KM total fuel range.
Refilled tank 10.9L.



125 jet ran well up till one third throttle, then started gasping.
But ran ok at 110Kmh cruise.

Decided to raise the needle up 2 clicks for the heck of it. This should not help mid and top: it didn't !
In fact the bottom end was a bit worse.

The theory now is to return the needle to its No. 3 mid position and drill the main jet progressively bigger till it runs satisfactorily up top.


Then the needle will be lowered to run as lean as possible at one third throttle, or less, the range in which most 'ADV' riding occurs.

That's the theory.......

[dino3310]

This guy is good with sorcing carb parts/jets, prices are pretty good.
ive brought the odd jet at variuos sizes from him http://www.trademe.co.nz/Members/Lis...?member=106097

[TINA RAY]

This guy is good with sorcing carb parts/jets, prices are pretty good.
ive brought the odd jet at variuos sizes from him http://www.trademe.co.nz/Members/Lis...?member=106097

JET DRILLS ARE KING DINO !



FINAL Test;

Put needle right Down.

Tried 135......then140......then 145 which ran very successfully.



SO:

MAIN JET....... 145

NEEDLE.......... FULLY DOWN

IDLE MIXTURE...... 2.5 TURNS OUT.




We'll see how it goes.......