OB1 Repairs: 505

Showing posts with label 505. Show all posts

Thursday, November 15, 2012

shed parts sale

cleanin' out the shed:

See pix here

Locals buy the whole lot for 500 ducks. OUTRAGEOUS 30% DISCOUNT.

30.00 - 27 mm brand new Feng Wey pit bike carb w/ header

15.00 - 14 mm Chong Qing mode of japan carb w/ throttle cable
5.00- prima g3 taillight

10.00- prima g3 steel engine cover

20.00- prima g3 side covers, minor damage

8.00- prima g3 plastic taillight mount

5.00- 6v horn

75.00- sachs 505/1x 6v stator plate w/ points (coils shot)

35.00-used- 505/1x/ puch e50 bosch 6v points flywheel

20.00- Peugeot 103 triple tree clamp (fork tubes shot, includable)

5.00- peugeot 103 speedo bracket

5.00- peugeot 103 headlight brackets

15.00- peugeot 103 variator cover

15.00- peugeot 103 flywheel cover (slight damage)

10.00- honda cl125 pipe bracket

30.00- honda cl125 pipe guard, chromey

80.00- 2 sachs mag wheels grimeca snowflake (brakes good, axles & bearings shot)

5.00- rusty fender (1)

20.00- shiny fender, yamaha rd250?

100.00- suzuki motor fz50

10.00- suzuki airbox cover fz50

40.00- yamaha dt100 steel rear fender w/ taillight bracket

20.00- yamaha dt100 plastic front fender

20.00- yamaha dt100 plastic sidecover

10.00- yamaha dt100 chain guard

15.00 ea. / 20.00 both- yamaha dt100 front & rear sprockets

Monday, June 18, 2012

sachs g3 performance clutch tuning

Stock Vs. Performance

Installation tutorial

So the stiffy springs went into the clutch part number 20 without too much knuckledragging and yep, not only do they work, they work better than stock, 'cause they're 15% stiffer. Testbed is my "problem child" sachs g3 w/ 505 /1A engine 48mm athena reed valve, 19mm Mikuni from a Kawasaki KH125 main jet 80 pilot 45 needle one notch from lowest, ghetto hacked biturbo pipe, stock gearing 43 mph top speed @ ~10K RPM. Frankly, it's ghetto as hell, and I know for a fact that I need new rings, but I digress. The clutch spline (No. 18) has been drilled and tapped for a set screw (w/ red loctite), plus two red loctited axle nuts tightened against each other on the end of the crankshaft (No. 12). So far, no problems with slip there. I have no tach so I'm guesstimating, but my guesstimate is engagement occurs ~1k, and the engine spins up enough power to make the clutch plates slip under extreme loads, but that's another problem most likely related to not having a shim in there. I'd say its a ~20% increase on stock takeoff engagement of around ~800 rpm. The bike takes off up grades that were previously impossible. As always, there is room for improvement. I look forward to hearing what people running superclutches or milled clutch plates have to say about their experience running these springs. If you're one of these folks that would like to replicate this experiment in yr own lab and report back with the lowdown, hit up OB1 to hook it up. Pix or it didn't happen: