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Haus of Projects / Re: Hybrid Project - RD250 AC/F2
« Last post by toffee on Today at 02:20:44 AM »
its only taken 7 years, I have dreamt many times of this.

at the moment I am prepping the frame for paint, I have the unwanted tabs removed and frame sanded. This evening Im going to treat the rust spots before paint.
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Turning Wrenches / Re: Bring the power curve down the rmp range
« Last post by SUPERTUNE on July 05, 2020, 11:04:58 PM »
Lean blistering plug dangerous . Plug may be too hot also for conditions
Rich,
He got some bad info on break in premix ratio and was running 20:1 and of course your right it will run leaner with the jets he has in them now.
Now that he has some break in time on it... he'll get it on a fresh mix at 40:1 and a gearing change will start to get him on the right track.
Chuck
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Turning Wrenches / Re: Oil Seepageā€¦.Normal?
« Last post by SUPERTUNE on July 05, 2020, 10:52:31 PM »
Has the engine been rebuilt with a new crank rebuild?
 When main bearings get old and loose they let the crank seals leak at speed...
Chuck
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Turning Wrenches / Re: Bring the power curve down the rmp range
« Last post by racerclam on July 05, 2020, 10:13:05 PM »
Lean blistering plug dangerous . Plug may be too hot also for conditions
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Turning Wrenches / Re: UFO??
« Last post by racerclam on July 05, 2020, 10:10:39 PM »
How many? Well I started with doing just 2 at half throttle position , the difference was evident ao I went to 2  Two at half throttle ann two at 1/4 . Worked even better noticable better snap and pull through those windows , Then about 10 years ago I tried 6  dividers 1/4 1/2 and 3/4 Waaaay better linear power through out . So I would say that experience told me what worked . How Long you ask they reach to the slide and conform to it with about 1mm clearence . I have alot of them out there . Go to my testimonial page of my web site and read what one guy said how it worked on his 2016 TM 125 with power valve . I told him thai I believed that with m carb a power valve wouldnt be necessaayso he did his own experiment , Check it out . I first did porting and carb as well as my reed conversion on His vintage racers on his 370 Bultaco as wel as hus Rickman Hodaka , both on the same page . I have don 15 carbs for a vintage snowmobile racer plus several port jobs and he won the biggest ice flat track race in the country with his Kohler 440 tripple that made 126 hp and 98 lbs torque . The is also a RD 400 on my site that had earned the #1 plate on east coast using my carbs and porting .

Rich
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General Chatter / Re: XT250 tank compatibility
« Last post by RattlecanResto on July 05, 2020, 08:37:52 PM »
I used to have an 81 many moons ago. Been keeping my eye out for a decent one....
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Turning Wrenches / Re: UFO??
« Last post by edgefinder on July 05, 2020, 07:52:21 PM »
The blades look like they could help but what tells you where or how many and how long does what?
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Turning Wrenches / Re: Ignition for Rotary Valve Twin
« Last post by edgefinder on July 05, 2020, 07:41:59 PM »
So I opened my eyes and see the RG400 has what i'm looking for. Notch on crank and pickup in case. The pickup is way too big to fit Bridgestone. In other pic is a smaller ktm 85 pickup where I would mount it but it reads a magnet not notch. I need something similar size. The ktm part is 19mm. I could use some suggestions on what ignition system with timing curve and pickup I can make fit. The machine shop part is easy i'm just not familar with the components.
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Turning Wrenches / Re: Bring the power curve down the rmp range
« Last post by waktaylor on July 05, 2020, 07:24:37 PM »
Rich, thank you for all this. I had Scott Clough set up the ports and whatnot for vforce3 reeds.
I am interested in that carb mod and have had poor results with other bikes having pod directly on carb. And i follow the fluid dynamics of it.

Thanks to everyone who has chimed in. I have a little carb tuning to do and moving away from stock gearing will help too.

I'll keep everyone posted but below is spark plug pic from 2nd gear chop cut after a 40 mile ride yesterday.



ok last one . Wore out trying to make pic work
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General Chatter / Re: XT250 tank compatibility
« Last post by Organicjedi on July 05, 2020, 07:23:05 PM »
They are nice. Versatile and bullet proof too.
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