OP
UTC

Enthusiast
Rally 200, Jet 200, TV 175 (two of them), Li150, GTS 250
Joined: UTC
Posts: 88
Location: Toronto, Ontario, Canada
 
Enthusiast
Rally 200, Jet 200, TV 175 (two of them), Li150, GTS 250
Joined: UTC
Posts: 88
Location: Toronto, Ontario, Canada
UTC quote
Here is a PX flywheel next to the new SIP lighten one. You can see the timing marks are in different spots. However, when I look underneath, the spot that fires the pickup looks to be in the same position relative to the key way.

So on the front side, is the mark to help with the timing relative? Could I just paint a new white mark straight above the keyway like on the px flywheel? It seams logical tp me, or am I missing something?

This way it will generally line up with my TDC marks on my case and make it easier yl set the timing.
Forum member supplied image with no explanatory text
@sdjohn avatar
UTC

Veni, Vidi, Posti
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8241
Location: San Diego, CA
 
Veni, Vidi, Posti
@sdjohn avatar
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8241
Location: San Diego, CA
UTC quote
The timing locations are different for small and large frame. This flywheel can do either. You should not use any precast mark for timing. Make your own Tdc mark using a piston stop and a degree wheel. Make your own timing marks for your timing gun if it doesn’t have advance. The casting marks are notoriously inaccurate.
@christopher_55934 avatar
UTC

Ossessionato
2007 Stella 225
Joined: UTC
Posts: 3547
Location: Rochester, Minnesota
 
Ossessionato
@christopher_55934 avatar
2007 Stella 225
Joined: UTC
Posts: 3547
Location: Rochester, Minnesota
UTC quote
sdjohn wrote:
The timing locations are different for small and large frame. This flywheel can do either. You should not use any precast mark for timing. Make your own Tdc mark using a piston stop and a degree wheel. Make your own timing marks for your timing gun if it doesn’t have advance. The casting marks are notoriously inaccurate.
Mine factory marks were off by something like 6 degrees.
OP
UTC

Enthusiast
Rally 200, Jet 200, TV 175 (two of them), Li150, GTS 250
Joined: UTC
Posts: 88
Location: Toronto, Ontario, Canada
 
Enthusiast
Rally 200, Jet 200, TV 175 (two of them), Li150, GTS 250
Joined: UTC
Posts: 88
Location: Toronto, Ontario, Canada
UTC quote
Yes, I always make my own timing marks on the case using a dummy plug. But what about 5he reference point on the flywheel.
@rowdyc avatar
UTC

Molto Verboso
GL, PK, PE200 with hack, Sears Rust Badge
Joined: UTC
Posts: 1346
Location: Deep in the heart of Texas
 
Molto Verboso
@rowdyc avatar
GL, PK, PE200 with hack, Sears Rust Badge
Joined: UTC
Posts: 1346
Location: Deep in the heart of Texas
UTC quote
davidsquaredson wrote:
But what about 5he reference point on the flywheel.
Your reference point is the new mark you make on the flywheel so the timing light can pick it up. Make a new reference mark.

@mjrally avatar
UTC

Veni, Vidi, Posti
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 59 Ser 2, 65 Silver Special, 90 V5N 50, 2015 HD Road Glide Special
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Posts: 5078
Location: Oceanside, CA
 
Veni, Vidi, Posti
@mjrally avatar
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 59 Ser 2, 65 Silver Special, 90 V5N 50, 2015 HD Road Glide Special
Joined: UTC
Posts: 5078
Location: Oceanside, CA
UTC quote
What crank do you plan on using? P style or Femsa Rally? If it’s a Femsa Rally crank, you can’t use either.
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