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Everything Dirt Bike
Make / Model Specific
Suzuki
93 RM250 Complete Rebuild
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<blockquote data-quote="JakeBoucher" data-source="post: 173502" data-attributes="member: 1844"><p>Started doing small things in the rebuild. I put my crank bearings in, repaired the hole in my case from the damned "case saver", adjusted my carb, resurfaced my head, cleaned up my power valve, installed new reeds, cleaned all the mating surfaces of the cases and covers, other little things. Still waiting on my crank.....</p><p>I put my cases in the oven at 210 degrees and my crank bearings in the freezer. Had no trouble getting them to slip in.</p><p></p><p>On my carb the jets in the bike when I got it were 190 main, 55 pilot, 2nd from the top on the needle, 1 and a half out on the mixture. I'm at sea level, 90 degrees and around 50% humidity and this thing was spooging out of the silencer like no other. It was super flat on top end too. I'm assuming it was way to rich. My service manual says stock is 180 main, 45 pilot, 3rd on the needle and 1 and a half out on the mixture. I have an fmf gnarly though, fmf says with their pipe 178 main, 55 pilot, 3rd on the needle, and 1 and a half on the mixture. I don't understand why the main jet drops when putting an aftermarket pipe on? I've really only done hop up on 4 strokes that's why I was expecting a larger main. Should I start with fmf's recommend jetting?</p><p></p><p>On my head it looks like a plug electrode must have broken off or something. It's a little rough but I wet sanded it with 400 grit to get rid of any burs or sharp edges. What do you all think about its condition?</p><p></p><p>The nikasil on my cylinder looks good, I'm going to hit it with a dingle ball hone to mate it with new rings. That's OK right? I only found a little imperfection in the nikasil, I'll post a photo I figure it's fine though.</p><p></p><p>Nikasil photo:</p><p><a href="http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile%20Uploads/1404887877888_zps459c806f.jpg" target="_blank">http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile Uploads/1404887877888_zps459c806f.jpg</a></p><p></p><p>Head Photos:</p><p><a href="http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile%20Uploads/20140708_174208_zpse53da546.jpg" target="_blank">http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile Uploads/20140708_174208_zpse53da546.jpg</a></p><p></p><p><a href="http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile%20Uploads/20140708_174158_zps041ec186.jpg" target="_blank">http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile Uploads/20140708_174158_zps041ec186.jpg</a></p><p></p><p>This is before resurfacing and sanding. Still looks much the same just no rough edges or burrs.</p></blockquote><p></p>
[QUOTE="JakeBoucher, post: 173502, member: 1844"] Started doing small things in the rebuild. I put my crank bearings in, repaired the hole in my case from the damned "case saver", adjusted my carb, resurfaced my head, cleaned up my power valve, installed new reeds, cleaned all the mating surfaces of the cases and covers, other little things. Still waiting on my crank..... I put my cases in the oven at 210 degrees and my crank bearings in the freezer. Had no trouble getting them to slip in. On my carb the jets in the bike when I got it were 190 main, 55 pilot, 2nd from the top on the needle, 1 and a half out on the mixture. I'm at sea level, 90 degrees and around 50% humidity and this thing was spooging out of the silencer like no other. It was super flat on top end too. I'm assuming it was way to rich. My service manual says stock is 180 main, 45 pilot, 3rd on the needle and 1 and a half out on the mixture. I have an fmf gnarly though, fmf says with their pipe 178 main, 55 pilot, 3rd on the needle, and 1 and a half on the mixture. I don't understand why the main jet drops when putting an aftermarket pipe on? I've really only done hop up on 4 strokes that's why I was expecting a larger main. Should I start with fmf's recommend jetting? On my head it looks like a plug electrode must have broken off or something. It's a little rough but I wet sanded it with 400 grit to get rid of any burs or sharp edges. What do you all think about its condition? The nikasil on my cylinder looks good, I'm going to hit it with a dingle ball hone to mate it with new rings. That's OK right? I only found a little imperfection in the nikasil, I'll post a photo I figure it's fine though. Nikasil photo: [url]http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile%20Uploads/1404887877888_zps459c806f.jpg[/url] Head Photos: [url]http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile%20Uploads/20140708_174208_zpse53da546.jpg[/url] [url]http://i1375.photobucket.com/albums/ag471/JakeBoucher/Mobile%20Uploads/20140708_174158_zps041ec186.jpg[/url] This is before resurfacing and sanding. Still looks much the same just no rough edges or burrs. [/QUOTE]
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Everything Dirt Bike
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Suzuki
93 RM250 Complete Rebuild
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