What to do with a drowned bike!

[Eric SmithMember]

350? Pfffft, go the whole hog, bolt on a 450, they have a common bottom end I’m told! :laugh:

AB, have you aprayed some anti-corrosive like WD40 into the chamber while you leave it overnight? Might be a thought to stop surface rust forming? If you are leaving it to drain anyway I mean.

[TrentMember]

Yeah thanks mate, I’ve been through a lot of water dispersant I might be wrong but wouldn’t all of the water in the chamber be gone now that I’ve run it a couple of times? I thought it was only the crank case that would still be “wet”.

If I was going to kit it it’d be a 280 kit I think. If I wanted a big bore I’d get a big bore but I love the revvy little bugger and for now if I replaced it I think it’d be a 310 but it’s not leaving me looking for more so no need. It’s also a lot cheaper just to get the bore re-nikasilled than to go buy a whole new one. When I bought my bike I found out that the bore was out of round and had to get it done and it cost me ~$350 for the bore exchange.

[GregMember]

Yeah the waters gone from the cylinder now time will decide if there ia a problem, just get the milk out of the crankcase and ride it and see

TB

[TrentMember]

The rain didn’t let off and I’m still flogged with a snotty head cold so I switched the alarm off this morning. I’ve put 3 lots through it so far and the footy is on tonight so tomorrow night I’ll be topping it up a 4th time and giving it a run then dump it and see how it looks then probably do the same again. I only bought 3 x 1L bottles of the cheap stuff so if it still looks milky after 2 more dumps I’ll have to make another run for cheap oil. I have some spare time on Saturday morning so I might take it for a gentle squirt around near buttai barn in the morning to see how it is. I wont be venturing far from the car so I dont think anyone will want to join me

[Anonymous]

It sounds like you’re doing all the right things so I hope you get rewarded with a nice working bike. If it has been running okay (even just for a couple of minutes) I would expect that it will be fine. Short of any bearing damage that TB mentioned previously there shouldn’t be much to cause a problem now

[TrentMember]

Cheers, it has been starting well on the kicker and running smooth and no unusual noises (which I reckon you’d here for a week in the little shed ).

I can’t tell you how much easier it is working on the bike knowing that I’m getting updated guidance and assurance here. I don’t need anyone to piss in my pocket and I reckon I’ve been pretty well informed of the range of outcomes to expect which is great.

I reckon I’ll have to add some dollars to the bro’s bill for consultancy fees and donate it

[drewMember]

[Eric SmithMember]

xy-transit wrote:

Quote:

um the 450 barrel and piston on the 250 makes 350.

to get 450 you’d have to put the 570 big bore kit in it. but i have not done the numbers, i doubt you’d get 450 cc out of it.

you are correct ux-mon ( he he Jamaican eccant)

in 06 i think? a dealer said the 250 t4 through 525 all shared the same engine cases.

so in theory you can bolt on the 525 top end.

hhmmm now the Husaberg is supposed to be the same cases as the 4t exc’s so you could do the 650 berg top end:huh:

See, I didn’t know that so I have learnt something!

[GregMember]

xy-transit wrote:

Quote:

ECKS-Man wrote:

Quote:

350? Pfffft, go the whole hog, bolt on a 450, they have a common bottom end I’m told! :laugh:

.

um the 450 barrel and piston on the 250 makes 350.

to get 450 you’d have to put the 570 big bore kit in it. but i have not done the numbers, i doubt you’d get 450 cc out of it.

you are correct ux-mon ( he he Jamaican eccant)

in 06 i think? a dealer said the 250 t4 through 525 all shared the same engine cases.

so in theory you can bolt on the 525 top end.

hhmmm now the Husaberg is supposed to be the same cases as the 4t exc’s so you could do the 650 berg top end:huh:

WTF is that all about WTF :huh:

I think thats good

TB

[Anonymous]

xy-transit wrote:

Quote:

um the 450 barrel and piston on the 250 makes 350.

to get 450 you’d have to put the 570 big bore kit in it. but i have not done the numbers, i doubt you’d get 450 cc out of it.

Have I missed something here? The CC of a bike is based upon the volume of it’s cylinder, i.e., 450 cubic centilitres.

If you bolt a 450 top end on you will have 450cc providing the stroke is the same.

For info the the bore and stroke is different from the 250 to the 450 so it’s more than just a piston and cylinder head. Both bore and stroke are (unsurprisingly) larger.

[drewMember]

Trailboss wrote:

Quote:

WTF is that all about WTF :huh:

I think thats good

TB

W o u l d

y o u

l i k e

m e

t o

t y p e

a

b i t

s l o w e r

o r bigger so you can keep up TB;)

BTW Ecks i was not belittling you just trying to informB)

[drewMember]

Moto wrote:

Quote:

xy-transit wrote:

Quote:

um the 450 barrel and piston on the 250 makes 350.

to get 450 you’d have to put the 570 big bore kit in it. but i have not done the numbers, i doubt you’d get 450 cc out of it.

Have I missed something here? The CC of a bike is based upon the volume of it’s cylinder, i.e., 450 cubic centilitres.

If you bolt a 450 top end on you will have 450cc providing the stroke is the same.

For info the the bore and stroke is different from the 250 to the 450 so it’s more than just a piston and cylinder head. Both bore and stroke are (unsurprisingly) larger.

yes Moto you’re correct. but if you put the 450 cylinder, barrel etc onto the 250 exc-f it increases it’s displacement to 350 mls. = millilitres.

[Anonymous]

xy-transit wrote:

Quote:

yes Moto you’re correct. but if you put the 450 cylinder, barrel etc onto the 250 exc-f it increases it’s displacement to 350 mls. = millilitres.

Ummmmm……I don’t think so!!

Firstly whatever the new displacement is it’s measured in cubic centillitres which is a volumetric measurement. ‘mls’ isn’t even an engineering unit, I assume you mean ‘ml’ which stands for millilitres. If the bike was indeed 350 ml the piston would be faaarking tiny!

EXC 250F bore and stoke is 76mm x 54.8mm giving a total displacement of 248.6cc
EXC-R 450 bore and stroke is 95mm x 63.4mm giving a dispacement of 449.3cc

Please note the units, there are no ‘mls’ or even ‘ml’ involved

If you put a 450 piston and head on the 250 without changing the stroke you get 388.59cc If you put a 450 piston and head, new conrods etc, so that the stroke is the same it will be 449.3 just like the other 450’s.

NB:- Values above were based on ’09’ models, older models will have different bores and strokes but the principals are the same.

[Anonymous]

Just for fun I worked out what the bore and stroke would be for your 350 ml engine :laugh:

Bore is a massive 14.94mm and the stroke is a whopping 2mm :laugh::laugh::laugh::laugh::laugh::laugh:

[Eric SmithMember]

Moto wrote:

Quote:

xy-transit wrote:

Quote:

yes Moto you’re correct. but if you put the 450 cylinder, barrel etc onto the 250 exc-f it increases it’s displacement to 350 mls. = millilitres.

Ummmmm……I don’t think so!!

Firstly whatever the new displacement is it’s measured in cubic centillitres which is a volumetric measurement. ‘mls’ isn’t even an engineering unit, I assume you mean ‘ml’ which stands for millilitres. If the bike was indeed 350 ml the piston would be faaarking tiny!

EXC 250F bore and stoke is 76mm x 54.8mm giving a total displacement of 248.6cc
EXC-R 450 bore and stroke is 95mm x 63.4mm giving a dispacement of 449.3cc

Please note the units, there are no ‘mls’ or even ‘ml’ involved

If you put a 450 piston and head on the 250 without changing the stroke you get 388.59cc If you put a 450 piston and head, new conrods etc, so that the stroke is the same it will be 449.3 just like the other 450’s.

NB:- Values above were based on ’09’ models, older models will have different bores and strokes but the principals are the same.

Volume of a cylinder = Pi x half of bore (radius) squared x stroke (height)

In this case with a 450 head on a 250 = Pi x 47.5 x 47.5 x 54.8 =388cc near enough

SO YA BOTH BLOODY WRONG! :laugh:

Moto, the difference is the shorter stroke.

[Author]

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