Fork Oil Level

gavcarter · Could Be A Chat Bot Joined: 28 Mar 2009 Karma :

Dont suppose anyone knows the fork oil level for a skyjet sj-125 its the cbr125 copy.

Passed MOT yesterday went for quick ride out and the front end floats around like a boat! They are way too soft.

_Iain_ · Banned Joined: 01 Feb 2012 Karma :

206ml of 10w oil is what's reccomended for the CBR125 (04-06 model)

I'd guess the suspensions likely a copy of the CBR too...however I'd be popping the caps off, adding an extra 20ml each side, test ride & repeat till such times as it feels right. A lot of the chinese bikes have really soft springs too, we found scooter variator restrictor washers are ideal for upping the preload a bit on a few of the AJS models.
____________________
Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

P. · Red Rocket Joined: 14 Feb 2008 Karma :

_Iain_ · Banned Joined: 01 Feb 2012 Karma :

Did you drop all the old oil out & fully extend the fork before putting the cap back on? Thinking air gap possibly out.

What weight fork oil? If your old mans gone and put 200ml of 10w40 engine oil in it then that might stiffen it up a bit too far too Laughing

https://www.olyslager-lubricants.nl/fuchs2R/Result.aspx?sType=39beea0a492092d36ba4aa4dd02b346e
____________________
Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

P. · Red Rocket Joined: 14 Feb 2008 Karma :

10W silkolene from Inta, details from Honda workshop manual Laughing

Hell, this shows it as even less Shocked

gavcarter · Could Be A Chat Bot Joined: 28 Mar 2009 Karma :

Its not a copy, its USD forks. I swapped them donkeys ago just for the "looks" knocked up some spacers and brackets for cbr wheel and brakes.

I have just decided after not riding for a while and getting back on it - it feels shit Crying or Very sad

Its no where near as planted as I remember with the standard forks on, I was nipping my arse cheeks incase the front wheel slid on me yesterday.

It all just feels too bouncy - like a dirt bike

_Iain_ · Banned Joined: 01 Feb 2012 Karma :

Autodata shows it at 131mm, 10w oil.

If listed as a quantity then they list cm3, so try a 131mm air gap Thumbs Up

____________________
Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

gavcarter · Could Be A Chat Bot Joined: 28 Mar 2009 Karma :

Just for the record, I measured the seals ordered new from wemoto for some other bike that where the same size and just poured some oil in as I had no idea how much too add.

Eventually got round to its first ride out and its soft as shit.

The springs are very soft, hardly any tension at all, I can put the caps back in by hand - where as on my 600 I need both hands and the fork legs clamped to get enough force to get the cap to screw in.

I may steal the springs for my 600 ( cbr600f '97 ) and just get "uprated" springs for that later on....

I also have a pair of spare springs for the chinese forks, I could lop a few coils of them and use them as spacers - probably end in tears knowing my luck...

gavcarter · Could Be A Chat Bot Joined: 28 Mar 2009 Karma :

Shoved an extra nut on top of the damper rod, let forks bottom out filled to top of tube with oil, then put caps back on, feels a lot better in back yard - doesn't dive as much on the front brake.

Will test drive later in the week when I get chance, poorly mrs and 4 kids Crying or Very sad