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Enduro Intake/Carburetion - 2 stroke Jetting, Reeds, Air Filters, etc. |
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#11
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I finally sent my head and carb off to RB. It was delivered last week to him, but the weekend came between then and him closing shop on 3/8 - 3/13. He was kinda busy as well I think, so not sure if I have a bit more wait. Sounds like he'll be taking my compression up a bit based on my testing. I'm really anxious to try it out.
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2011 Gas Gas EC300 38mm, 2008 Husky TE610, 2003 Beta Rev3 250 |
#12
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I've got about 20 hrs on the RB mods (squish optimization and carb mod). I have to agree with everyone, more lower end easier to adjust the jetting, no draw backs to date. I'd recommend to anyone. Ron got my parts on Friday, and had 'em shipped back to me the following Monday. He must be busy, and I wouldn't doubt it a bit.
Tim
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2010 EC300 2003 YZ450F 2006 SSR125 2005 Z1000R 1997 GL1500 |
#13
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Got my head and carb back from Ron and hope to get it back together in the next day or two and test. Visually his work looks top-notch. From everything I've heard I'm expecting great things here. I'll chime back in with my impressions when I get it back together.
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2011 Gas Gas EC300 38mm, 2008 Husky TE610, 2003 Beta Rev3 250 |
#14
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I'll be waiting for the chime!
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#15
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What is he doing to the new(er) carb?
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#16
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What I can see easily is he put the divider plate in my AS II and bored it out to 39mm I assume. There is also a different jet block installed with the tower that the stocker didn't have. Haven't looked close enough yet to see if he modified the slide or low speed circuit, but those are still listed as part of the mod. He's still jetting with the CEK needle.
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2011 Gas Gas EC300 38mm, 2008 Husky TE610, 2003 Beta Rev3 250 |
#17
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What is Ron Setting out for Jetting on ASI for a 300..
My 250 he sent: cek # 3 42 178 Feels ok on my 300 a little fat on the bottom but very linear.
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2011 Sixdays 300 |
#18
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I await on how the mod affected motor performance (revs pre & post, for example).
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#19
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He also cuts the slide.
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#20
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Chiming back in on my results so far
I was able to finish bolting up my rb-designs mod'd head and carb yesterday and get out for a little rip. As I mentioned before the man's work just looks top-notch. The first thing I did was another compression test. It was 148psi when I sent the head out and it now tests at 150psi. I told him to set it up for pump gas, but I expected we'd be up a bit higher than that compared to other readings I've read about. I've got an inexpensive compression tester I picked up at Autozone, which I assume is consistent if nothing else. Whatever, I emailed Ron to let him know what it tests at now and he said it was fine, more about getting the squish correct. I just wonder if there is something more to be safely had out of it. What do you guys think?
I left all of rb's carb settings as is and just took it for just a quick little rip. The bike pulls strong and clean from about 1/8 and all the way up. No complaints there. I'd say it's as clean in this range as any jetting iteration as I had tried, which was quite a few (although not near as many as Jakobi!). His settings are a little rich down low, but I've got plenty of jets to play with including the ones he sent me. I didn't have any time to play with slow jetting yet and I'm really anxious to see if my air screw actually works now. I need to get out and put some time on it and post back.
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2011 Gas Gas EC300 38mm, 2008 Husky TE610, 2003 Beta Rev3 250 |
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