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Offline Tim754

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Re: WTF ??
« Reply #15 on: December 13, 2014, 06:41:39 pm »
"?......Im not, I've got all three.....Honda, KTM and Honda/KTM   ;D ;D"   and bugger that's got me snookered :-\ ;) :)
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Offline YUMASTEPSIDE

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Re: WTF ??
« Reply #16 on: December 14, 2014, 02:42:26 pm »
A little more info.......when I started to pull the motor down, I found that the little shit that I got it off, had taken the CR ignition, CDI and coil out. >:(....anyway thats not a real drama, it just would have been interesting to see if it worked.
   What these clowns have done is heated the front downtube and pulled it forward about 60 mm, but it didnt bend at the heat, it kinked the front of the tube :o THey have also cut the lower cradle tubes to let the front downtube move forward and just welded some pieces of scrap in to fill the space......being a chromemoly frame I'd hate to think what these infills were made of........I'm starting to take this as a personal challenge that I can still salvage this abortion.......time will tell like........stay tuned 8)

                       Roger

              P.S.    It WAS an '84 125 :'(
« Last Edit: December 14, 2014, 02:44:44 pm by YUMASTEPSIDE »
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Offline YUMASTEPSIDE

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Re: WTF ??
« Reply #17 on: December 21, 2014, 02:11:42 pm »
Finally got around to pulling this motor down........my guess would be that it was one of those 185 motors the kids learn speedway on.
  For starters it has an oil line fed, twin bearing cam with some major lift and some very fancy valve springs. The cam is a two piece unit joined with a roll pin.

                   

                                  Roger
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Offline YUMASTEPSIDE

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Re: WTF ??
« Reply #18 on: December 21, 2014, 02:15:34 pm »
.................the inlet port has been enlarged from 27mm to 32mm  (Std XR on left )

                           

                                 









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Offline YUMASTEPSIDE

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Re: WTF ??
« Reply #19 on: December 21, 2014, 02:17:50 pm »
...............some major combustion chamber work.......I haven't taken the valves out yet, but I'd hazard a guess that it is ported   ;D

                     

                         XR on right
« Last Edit: December 21, 2014, 02:23:27 pm by YUMASTEPSIDE »
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Offline YUMASTEPSIDE

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Re: WTF ??
« Reply #20 on: December 21, 2014, 02:21:06 pm »
................the cam

                     

               
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Offline YUMASTEPSIDE

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Re: WTF ??
« Reply #21 on: December 21, 2014, 02:24:48 pm »
...................oil feed from case gallery

                     
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Offline YUMASTEPSIDE

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Re: WTF ??
« Reply #22 on: December 21, 2014, 02:30:55 pm »
The piston had one gudgeon circlip missing which created a gouge down one side of the barrel, but the curious thing is this erosion mark on both sides of the barrel......almost like some sort of combustion burn ??    ??? :o



                                 Roger                                       

                               
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Offline Tim754

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Re: WTF ??
« Reply #23 on: December 21, 2014, 10:27:24 pm »
How many gears Roger? Some of the speedway junior build ups had less than standard. Does explain the (missing) Ignition set up. Still an interesting little find and thanks for the piccies. Cheers Tim754
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Offline Nathan S

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Re: WTF ??
« Reply #24 on: December 21, 2014, 11:54:23 pm »
Quote from: Tim754 on December 21, 2014, 10:27:24 pm
How many gears Roger? Some of the speedway junior build ups had less than standard. Does explain the (missing) Ignition set up. Still an interesting little find and thanks for the piccies. Cheers Tim754

The kid had it up on FaceSook, with some clear photos of the ignition....
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Offline brent j

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Re: WTF ??
« Reply #25 on: December 22, 2014, 01:13:01 am »
I wonder how well the CR ignition would work.

Don’t two strokes retard the timing with revs and four strokes advance it?
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Offline oz555ktm

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Re: WTF ??
« Reply #26 on: December 22, 2014, 07:28:09 pm »
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Offline David Lahey

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Re: WTF ??
« Reply #27 on: December 22, 2014, 08:17:58 pm »
Quote from: brent j on December 22, 2014, 01:13:01 am
I wonder how well the CR ignition would work.

Don’t two strokes retard the timing with revs and four strokes advance it?
Both benefit from the ignition advancing with increasing RPM. It is to do with the rate of fuel burning being insensitive to RPM while piston velocity is proportional to RPM, so at higher RPM the spark has to happen sooner so the most benefit is gained from the pressure pulse
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Offline FourstrokeForever

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Re: WTF ??
« Reply #28 on: December 23, 2014, 10:34:24 am »
Quote from: YUMASTEPSIDE on December 21, 2014, 02:30:55 pm
The piston had one gudgeon circlip missing which created a gouge down one side of the barrel, but the curious thing is this erosion mark on both sides of the barrel......almost like some sort of combustion burn ??    ??? :o



                                 Roger                                       

                               

Looks like oil blowing past the ring end gap and causing hot spots in the cylinder to me. Or it could of got dusted sometime which caused the worn ring end gap.....

Interesting motor all the same. The $$$ spent on the head work and bearing cam would no doubt exceed what you paid for the thing.  ;)
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Offline pokey

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Re: WTF ??
« Reply #29 on: December 23, 2014, 10:48:53 am »
Nice play thing. How's the piston looking? That bore damage seems to be in the same position as the head mods. Detonation perhaps?
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