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Post by shergar on Jun 13, 2020 14:27:41 GMT 1
is there any tips on taking seals out of front forks lc250.
what number should be stamped on the lc250 ex.pipes .
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Post by tony2stroke on Jun 13, 2020 18:25:09 GMT 1
4L0 for 250 and 350, but they are different inside, 4 x 10mm holes in first baffle plate and 8 x 10mm in 350, identified by paint on exhaust hanger, blue 250 yellow 350 with 0 stamped on back of hanger, there is also German restricted 4L2, these have a restriction in the downpipe, and then 4L3 Japan AFAIK.
Fork seals can be prised out easy after you take out the tubes, held in by the bolt at very bottom of fork and the clip at top of fork.
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Post by shergar on Jun 13, 2020 21:00:07 GMT 1
pipes have 4l0 no 0 or paint colours as they have been painted at some stage also the baffles have been changed id say diff from original so is it just a case of fitting the correct baffles then ? .
on the forks sorry what i ment was taking the seals out at the top with all other items removed , what do you use to prize them out without doing damage to surrounding area ?
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Post by tony2stroke on Jun 13, 2020 22:01:39 GMT 1
I have a 90 degree bent screwdriver that I use, and I just pull on it put behind the seal using like a slide hammer motion, don't use the side of the lower tubes as a lever point, you can crack the alloy, then your look for new bottoms, if they are stuck with corrosion, spay all around with ACF50 and leave it overnight or longer if you have the time, if that doesn't work I use phosphoric acid (alloy wheel cleaner) tip bottoms upside down and immerse in it, keep checking frequently as it can start eating the alloy, this is a last resort, it eats the corrosion.
I don't understand your question about the baffles, a photo may help, or are you wanting to make them 350 exhaust if they are 250 ones, can be done, but you have to cut and weld, please elaborate on it, I may be able to help.
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Post by shergar on Jun 13, 2020 22:36:22 GMT 1
no im just making sure i have the correct pipes for the 250 ( NOT 350 ) as the pipes are 4lo .
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Post by tony2stroke on Jun 13, 2020 23:16:13 GMT 1
Only way to be sure is to use an endoscope down the exhaust, to see if 4 10mm holes or 8 10mm holes as there is no paint evident, and no stamped 0 to be sure without doing this, the 0 can been sanded out when preping for paint. Have a look on here to see the bit I talk about. www.rd350lc.net/pageEXHAUST.htm |
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Post by shergar on Jun 13, 2020 23:25:04 GMT 1
im with ya mate thanks for that , p
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Post by shergar on Jun 13, 2020 23:37:27 GMT 1
if and only if the pipes are 350 inside can they be used on the 250 , is there a diff in performance ect by using the 350 for better or worse ( rest of the 250 will be total stock ) ? can the 350s be turned into 250s ?
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Post by tony2stroke on Jun 13, 2020 23:44:49 GMT 1
The extra holes in the baffle plate will allow more return pulse, Yamaha did recommend 350 exhausts on a 250 but not the other way around for track use, they also recommended cutting open and removing the wire wadding from the belly of the pipe and taking off the wadding on the baffles for track use, the tuned length and the dimensions of the pipes are the same.
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Post by shaunthe2nd on Jun 13, 2020 23:46:21 GMT 1
If you find they are for 350s I will swap you for a good 250 pair.
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