X5 spur gear and more

[Fiddybux]

Hey Chris and Super Dan!

Cheers for the advice guys.

The pucks are ok, and not really a problem as they're dirt cheap. I bought several packs not to long ago so all good on that front. The little shims that come in the slipper rebuild kit are very handy too.

Where are you at over the next couple of Sunday's Chris? If you're not too far away maybe I'll swing over for a chat. Failing that it'll be the GP for some last minute tweaks.

I really want to get this sorted for good this time. I love the car and it loves me. We drive well together. Even with crappy baldy scummy greens (properly bald from running in the street!) on carpet it was a killer machine through the bends and had just the right amount of power slidage!

Tail end of last outdoor seasons in the rains at Southport it was a bad ass momma jamma. I love racing in the wet and the X5 just makes it even better for going forward sideways!

Take it easy and have a merry Christmas.

[Chrislong]

Hey Russ,
As far as I know there is no racing on for the next two sundays.... but if you know of any please correct me, as I am in need of somewhere to go, LOL.

My next meeting is Worksop on 6th January, and then SRCC on 13th..

[minichamps11]

Hi,

Just bought a second hand X5 and stripped it down to rebuild over the weekend. I noticed that the X5 slipper pulley isn't round so dropped the XX-4 part in, however I can't get the spur gear to run true.

The slipper shaft is slightly smaller then the hole in the centre of the spur, so the spur runs out of round and moves up and down affecting gear mesh. Is this normal? The spur is a white machined one, no idea how many teeth as it doesn't seem to be marked (and there are way too many to count!).

Any tips or do I need a new spur?

Regards,

Ian


Quote:

Not sure I follow on the pulley thing, they only come in 1 size which is the same as the stock X Factory ones. I run the 17t xx4 centre pulley as unfortunatly the stock X factory one is not perfectly round. That and a hold down roller in front of the pulley makes a MASSIVE differene to how slack you can set the belt with zero skip.

[bigred5765]

cant say i have ever noticed up and down movement the spur, there is a little side play

[Chrislong]

Sounds like the spur is Fubar'd, they can wear. If there is slop in that centre hole on the layshaft id certainly recommend retiring the spur.

With the XX4 pulley (it is 1 tooth bigger than the X-factory pulleys), you will need a shim as the gear is narrower than the stock pulley - and you don't want your layshaft floating around.

[super__dan]

As above, only other thing to check is whether the layshaft is bent?

[_sleigh_]

Dan/Chris,

Having not ever seen a X-5 slipper in a state of disassemble before, is it possible to re-drill the centre of the spur to accomodate a bearing. This might help reduce the friction/wear when the spur is 'slipping' against the layshaft.

Just a thought, as it might save the cost of a new spur. I know it's not a job for a dremel, but I'm sure a friendly engineer could do it quick smart.

[super__dan]

It would as long as the bearing was no wider than the spur (narrow), has the same ID as the OD of the slipper shaft and you could drill it dead centre. None of which would be easy.

To be honest though what spurs have bearings in normally? I don't think it's necesary as I know my slipper is nearly locked, slips way less than my 2wd which doesn't have a bearing on the spur.

If this one is FUBAR then it just must have been running slipping for ages I think. Also sounds a good idea to upgrade to the 108 or 110 spurs (newer ones) which are better with brushless motors IMHO.

[bigred5765]

chris kiddys on this weekend

[Chrislong]

Originally Posted by bigred5765

chris kiddys on this weekend

ok, there must be a reason you have said this here -

Yeh that would work Phil, it'd be a bit excessive for a slipper though - they only wear like this if they are allowed to slip far more than they need to - i.e. screaming its tits off for 3 metres. I run my slipper tight, and spurs last ages and ages - but I have fallen fowl of melting it in the past. (Let it slip like mad at Oxon national)

[Northy]

I bet Jim could do it with his eyes closed, and one arm behind his back. It'd be to less than a thou too

G

[_sleigh_]

Originally Posted by super__dan

It would as long as the bearing was no wider than the spur (narrow), has the same ID as the OD of the slipper shaft and you could drill it dead centre. None of which would be easy.

To be honest though what spurs have bearings in normally? I don't think it's necesary as I know my slipper is nearly locked, slips way less than my 2wd which doesn't have a bearing on the spur.

If this one is FUBAR then it just must have been running slipping for ages I think. Also sounds a good idea to upgrade to the 108 or 110 spurs (newer ones) which are better with brushless motors IMHO.

Originally Posted by Chrislong

Yeh that would work Phil, it'd be a bit excessive for a slipper though - they only wear like this if they are allowed to slip far more than they need to - i.e. screaming its tits off for 3 metres. I run my slipper tight, and spurs last ages and ages - but I have fallen fowl of melting it in the past. (Let it slip like mad at Oxon national)

Yeah that's cool... I know it was an OTT idea, but I didn't know if it was a common problem..

[bigred5765]

[QUOTE=Chrislong;100643]ok, there must be a reason you have said this here -


Hey Russ,
As far as I know there is no racing on for the next two sundays.... but if you know of any please correct me, as I am in need of somewhere to go, LOL.

thats would be this lol

[bigred5765]

Originally Posted by Northy

I bet Jim could do it with his eyes closed, and one arm behind his back. It'd be to less than a thou too

G

i know of a man that works to microns a thou would be hugh to him

[_sleigh_]

Originally Posted by bigred5765

ok, there must be a reason you have said this here -

Yeah but Chris posted that back in December.

[bigred5765]

dont usually spend the time to check dates on every post i reply on

[Chrislong]

Originally Posted by bigred5765

dont usually spend the time to check dates on every post i reply on

Ha ha, it is comedy tho Carl

[minichamps11]

The problem is that the hole in the centre of the spur is about 1/2mm diameter bigger than the shaft.

The spur does look like it's been slipping for ages. Just now I tried to set the slipper as per the manual & had the slipper nut jump and slip down the layshaft. The thread looks knackered so no surprise there. I guess the nut's been jumping in use, killing the spur. I'll be getting a new spur, but was a little shocked at the price of a new layshaft. Having said that, it's not something you'd normally need to replace...... I'm going to try a new nut and keep my fingers crossed.

I tend to use 10x2 / 9x2 brushed Checkpoints in my 4wd, so with that in mind, is a 108 spur the best overall choice with the XX4 pulley? What size pinion for a 10 turn?

Next question: the car is fitted with narrow alloy rear pivot blocks (from a Losi 2WD?) so that the wishbone pivot pins sit closer to the centre line of the car than my XX4. The wheel hubs are fitted to the outside pair of holes on the new style rr wishbones.

As the driveshafts only just sit in the rear diff outdrives, I'm guessing this makes the rear of the car wider than standard. Any clues what this does to the handling? Am I better off with the standard XX4 setup?

[bigred5765]

Originally Posted by Chrislong

Ha ha, it is comedy tho Carl

hmm lol

im pretty sure mine doesnt move any were near that much ill be at kiddythis weekend i have spares u can compare if ur there
i have layshaft and spur gears
on a 10x2 reedy we were on a 108 x 20 or 22 outdoors depending on the track
sorry no idea on the rear track width of the car

[super__dan]

I defo used to run a much smaller pinion than that on checkpoints (10 *2's), 17 sounds familiar.