YBR 125 rattle

[WD Forte]

A guy is bringing round a bike he just bought off Gumtree against my advice I might add

Its a 2011 YBR125 done 33,000 miles and he says it 'rattles' at 40mph and wont go any faster
then he checked the oil and topped up
and says it's slightly faster but still 'rattles' at 40

I'm still waiting to see it
Any tips on what to check? common weaknesses faults on these things?

Worst case scenario, major bearing run dry and fooked
so it's decent SH lump hunting or
Is there a chinese equivalent engine that will plug and play?

TIA
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bikers smell of wee

[Evil Hans]

[BusterGonads]

Worst case scenario and it has a worn out main or big end, these small singles are not that hard to dismantle and repair with new bearings.

[WD Forte]

Yep simple enough but if the crank has any scoring it can get more complicated, time cpnsuming and expensive.
Bike history is uknown it may have had 33000 hard miles
It doesn't sound smooth at all, I suspect no/low oil and main bearings

Plus he wants it yesterday and just told me he's sourced a second hand lump locally he's assured is a good un, so I'm swapping them over for him.
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bikers smell of wee

[BusterGonads]

[WD Forte]

I've started stripping stuff off and removing the wheels,
the daft sod bought with illegal/bald tyres and didnt know !
( he bought it cos it was red..... FFS!)
so wheels will go in for new boots as I swap lumps

problemette:
the tank is ready to lift off but not sure how to release the fuel pipe
from underneath.
It has brown clip that moves a bit and obviously has something to do with locking it on to the plastic pressure pipe from the pump.
I dont want to get heavy handed and break the bugger or plastic pipe so any tips anyone?
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bikers smell of wee

[Evil Hans]

If I remember right, there is a knurled side on the brown clip? I think you slide the clip by pushing the brown bit towards that side, and it should release the hose.

If it's the type I'm thinking of. I could be wrong!


Edit - found a pic. Can anyone confirm that's how it works?
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Triumph Sprint ST 1050. And it's Red.

[WD Forte]

Thanks that's the one
I did try pushing it in the direction of the knurled bit and tugging/twisting etc but as i has history of breaking delicate fings what wont come off proper, I'm trying to be good for a change.
For now it's perched on top out of the way as much as possible.
Breaking the clip wouldn't be a total disaster as I'd just cut the tube back a wee bit and bung a jubilee clip on the fecker.
Breaking the plastic pipe would be new pump time
I'll see how it goes

Anyway I have a bigger problem
The engine bolts are all crusty but I got them all to move ready to drop the engine, but when trying to move the most inaccessble one at the bottom, the bold head sheared off!
ahh shit, it's always the hardest to get at ones that give you grief
The bolt body is well stuck in the casing and the threaded part is through the frame

Tomorrow I'll see if I can get a 1mm disc cutter blade under there to cut the bolt through the casing but that takes me back to getting the tank safely out of the way...........
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bikers smell of wee