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Post by chasbald on Oct 8, 2013 14:25:35 GMT 1
I'm wondering about modifying my 250LC up to 350. would it be as easy as just to change the piston and barrels on my 250 lc for 350 lc ones,
and has anyone else done this
regards
Chas
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Post by winnerevo1 on Oct 8, 2013 14:47:00 GMT 1
Not quite, you would need the 350 head or the the 250 one re-cut, a 350 head gasket and an oil pump from a 350. Preferably 4L0 carbs too but you could get away with re-jetting the 4L1 carbs.
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Deleted
Deleted Member
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Post by Deleted on Oct 8, 2013 15:06:31 GMT 1
Also the standard exhausts on 250 and 350lc's are different
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Post by winnerevo1 on Oct 8, 2013 15:58:05 GMT 1
Also the standard exhausts on 250 and 350lc's are different They are not different enough that it wouldn't run OK though. The head and oil pump are needed for obvious reasons. |
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Post by ulsta on Oct 8, 2013 16:03:59 GMT 1
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Post by winnerevo1 on Oct 8, 2013 16:08:14 GMT 1
That's just confusing the bloke, you don't need a different clutch basket at all.
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Post by Delbert on Oct 8, 2013 16:20:59 GMT 1
If you keep the 250 carbs , dont be fooled by jetting as 350. .you may need to but I had to down jet , its all to do with how much air the larger bore can pull through the 250 air ways , so bigger jets can make it way rich . Something you will have to play with. I ended up at 180 mains
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Post by shaunthe2nd on Oct 8, 2013 16:45:26 GMT 1
I wish those prices in your article Ulsta were still valid!
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Post by copper99 on Oct 9, 2013 8:29:49 GMT 1
The conversion article was a good read ulsta, thanks for posting that.
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Post by robin on Oct 9, 2013 9:10:30 GMT 1
Rear front and rear sprocket too.....
I converted mine a few years back, relatively easy job, once you get all the parts..
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Post by winnerevo1 on Oct 9, 2013 10:18:21 GMT 1
Front sprocket is the same for both at 16T. Only the rear is different at 41T for 250 and 39T for 350
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Post by 47x on Oct 9, 2013 10:27:33 GMT 1
plus cush drive on 350,
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Post by jon on Oct 9, 2013 18:56:44 GMT 1
I'm really surprised no-one has mentioned what IMO is the first stage of the conversion.
The RD350LC was obviously fitted with a twin break setup. I would highly recommend standard 350 setup or improvements.
Of course there are a number of differences that are irrelevant, like the twin horn setup.
47x also has a point. The cush drive was obviously an attempt at taking some of the snatching load on the gearbox of the bigger machine. If its a standard 350 and you drive it with some respect for mechanical damage you may be alright? Better to convert though in the long run.
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Post by winnerevo1 on Oct 9, 2013 20:04:03 GMT 1
You forgot the lefthand headlamp bracket!  250 LC wheels are lighter though.... |
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Post by thehut on Oct 9, 2013 21:58:09 GMT 1
been looking for that 350 conversion write up. cheers for posting it.
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rd350pc
L plate rider.
It's in your blood!
Posts: 28 
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Post by rd350pc on Sept 20, 2014 20:55:43 GMT 1
Front brake master cylinder has larger 5/8 bore
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Post by carioca656 on Sept 21, 2014 10:20:49 GMT 1
& don't forget the twin horns, seriously all you need is 350 top end or send urs to fahron to be re lined and a 350 oilp pump and drive, carbs will need rejetting everything else will make it better but isn't really necessary IMO
adie
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