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    Barn Fresh Rat gone woody

    Thanks Rick, Years ago I supercharged a Honda 50cc minibike and used a 17 mm(?) flat slide delorto from a 50ccFantic super rocket. The 'blower' was the guts of a pneumatic sander ( rotary vane pump) pressed into a slug of aluminium and driven at about 2.6 to 1 from a tiny v belt from a vacume...
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    Barn Fresh Rat gone woody

    Thanks. The front of the pipe was rotten when I got it so I cut it back to where the steel was solid, fabricated a new extension of the diffuser. The original pipe was a larger diameter at the cylinder though. Long story short I think I need to add about 2 inches to the header. This motor is...
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    Barn Fresh Rat gone woody

    I realised i had a nice 18mm Delorto from an old 1950s Garelli. Turned up an inlet manifold ...wow...the power difference from the old stock unit is crazy. Beautifully made carb. Jetting seems perfect. Wish I had faced off another 6mm to give me more space to fabricate an air filter. Needs...
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    Barn Fresh Rat gone woody

    Now that it's ripe I think I will restart this dirty rat. DT 50 pipe.
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    Stihl ms660 54mm project

    Very refreshing! Nice to see. Im slightly concerned about the bore not being square to the cylinder base flange. A few thou can rob power. What size carb are you running? The zedafrank vid showed a little blow back from the carb? would you consider a reed setup or not enough space? Some of the...
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    Rat gone Woody

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    Rat gone Woody

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    Rat gone Woody

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    Rat gone Woody

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    Rat gone Woody

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    Rat gone Woody

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    Yamaha DT 50 pipe and jet

    I'm getting good results using a DT50 main jet. I turned it down slightly and ran a tap over it to make it fit in the stock carb. I also used a DT50 chamber that I cut and modified. I tried to keep the pipe the same length as the original yamaha length. You can check it out over on the rat...
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    Rat gone Woody

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    New Rat

    Really awsome. Keep up the good work.
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    Modded Boost Bottle

    Should a boost bottle actually be the same volume as the crankcase rather?
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    Performance CDI layout and schematic diagrams

    I appreciate everyones input and exhaustive testing on the CDIs but I really am curious about the other end....the rotor, the primary winding the strength of the magnets the quality of the laminated steel? Did I miss something or has this aspect of the ignition been generally overlooked when...
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    alternative ignition

    Has anyone ever considered removing the ignition winding at the rotor and using the lighting coil to charge a li po. Then running a CDI from a model aircraft engine? The obvious benefit is it would be easier to advance and retard the static position of the hall effect sensor. One could almost...
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    super rotor 2000

    Apologies if its been discussed before. Has anyone considered using rare earth / neodimium magnets to make an ignition rotor? Would it help induce a stronger current and help the cdi? Cheers Simon
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    Bell mouths

    Thats interesting, I have a large collection of model aircraft engines from the 1930s to the present. Many have nicely turned venturis that incorporate some kind of bellmouth at the opening. Some new 50cc gas engines for rc planes incorporate a trumpet with a nicely rounded bellmouth. Alot of...
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    Bell mouths

    Some time ago I read a series of articles about racing older generation 2 strokes. The bellmouth on the carbs seemed to play an important role in 2 stroke tuning (with piston porting anyway). It seems to be a negleted topic here on the china girl motors. Anyone ever tried experimenting...