Bogging at first 1/4 throttle [SOLVED with new motor]
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Ossessionato
73 Rally, 74 Rally, 76 ET3, 80 P200, 63 Li125, 65 Li225 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
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Location: Oceanside/ SF
Wed Apr 10, 2019 2:38 pm quote
Tradspa wrote:
What makes a vespa transmission change gears on its on under hard load?
Incorrect cable adjustment, worn shift cross, incorrect gear shimming
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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
Joined: 05 Jun 2018
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Location: Cary, North Carolina
Wed Apr 10, 2019 3:13 pm quote
MJRally wrote:
Tradspa wrote:
What makes a vespa transmission change gears on its on under hard load?
Incorrect cable adjustment
Could too loose do it?
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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
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Wed Apr 10, 2019 3:35 pm quote
This is exactly what its doing, god help me.

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Ossessionato
73 Rally, 74 Rally, 76 ET3, 80 P200, 63 Li125, 65 Li225 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 3261
Location: Oceanside/ SF
Wed Apr 10, 2019 3:54 pm quote
Before you push your motor too hard, have you verified your cylinder is new and jetting is correct? If its new, you need to baby it and break it in and stop pushing things for now.

If the tension is off on either cable it could pull the motor into gear. Tension should be even on both side and flex in towards the batwing gear 1/8" maybe.

Try riding again without leaning too much on your left handgrip. You might be accidentally encouraging it to shift. Thats what I've found with VBBs ridden by friends.
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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
Joined: 05 Jun 2018
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Location: Cary, North Carolina
Wed Apr 10, 2019 4:01 pm quote
MJRally wrote:
Try riding again without leaning too much on your left handgrip.
I did. I was holding it very loosely when it happened, intentionally, for the reason you stated. I have just been puttering around in my neighborhood doing 30mph max, mostly 20-25. Its done this several times now going uphill in 2nd and 3rd both. I thought it was because the cables were too tight so I loosened them some and have been light on the handgrip....but it happened again this evening, twice.
Ossessionato
73 Rally, 74 Rally, 76 ET3, 80 P200, 63 Li125, 65 Li225 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 3261
Location: Oceanside/ SF
Wed Apr 10, 2019 4:07 pm quote
How loose did you loosen them? Even tension with a slight flex like mentioned?

Ok switching topics, what condition is the cylinder in?
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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
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Wed Apr 10, 2019 4:10 pm quote
MJRally wrote:
How loose did you loosen them? Even tension with a slight flex like mentioned?
Yes
MJRally wrote:
Ok switching topics, what condition is the cylinder in?
I assume its new, its supposed to be anyway. Who knows. It runs great.
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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
Joined: 05 Jun 2018
Posts: 289
Location: Cary, North Carolina
Wed Apr 10, 2019 4:43 pm quote
I have learned over the past 3 years dealing with classic vespa that the worst case scenario is probably what I am facing, its turned out that way more often than not.

What do you want to bet that this clown from OSC who left the flywheel nut loose and who used a cheap india kickstart lever that stripped also used the wrong shifter cross?

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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
Joined: 05 Jun 2018
Posts: 289
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Wed Apr 10, 2019 4:50 pm quote
this thread Can a rookie change a Cruciform? first reply.


Okay I did have OSC change the selector box to one with no neutral switch since I put the motor in a VBB...and they used an cheapo LML selector box. Maybe thats it.

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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
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Posts: 289
Location: Cary, North Carolina
Wed Apr 10, 2019 4:52 pm quote
oh son of a b...

Welp. looks like i'll be installing my vintage kick start quadrant for a vintage kick start lever after all, since I have to take this $2k POS apart.

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Ossessionato
05 Stella, '62 VBB, 76 Sprint V, 63 GL
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Location: Chicago. Well, Evanston, but that's almost Chicago
Wed Apr 10, 2019 5:19 pm quote
Tradspa wrote:
What makes a vespa transmission change gears on its on under hard load?
Is this a problem you're now having?

I hope not, because if the transmission is jumping between gears, that generally means worn parts, the cruciform and/or the gears themselves.
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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
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Wed Apr 10, 2019 5:57 pm quote
the saga continues here: Selector box issues and engine buying advice
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1974VLB 1979VSX 1974V9A
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Thu Apr 11, 2019 9:23 am quote
By the rev limiter do you mean the CDI? I wouldn’t gear a bike around the CDI… I would just get a different CDI.

I have a similar set up for the DR Kit and I find the stock cog and gearing better for climbing hills and maintaining speed it to the wind.

No point in curing a bike for higher speeds if you’re not interested in doing them. Right?
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1974VLB 1979VSX 1974V9A
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Thu Apr 11, 2019 9:24 am quote
I posted this in the wrong area sorry guys.
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'01 ET4; '65 VBB Restomod with P200E engine, '67 VW Type 1, '80 Airstream
Joined: 05 Jun 2018
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Location: Cary, North Carolina
Wed Jul 03, 2019 2:52 pm quote
Update

Vespa P200E motor purchased from www.olympiascootercompany.com @olympiascootercompany for $1923.07 on March 14 2019 who now refuse to help me. Never buy a motor from this shop.



So far the engine has had the following problems:
1. loose flywheel nut broke the flywheel key on the first kick after installation
2. kick start lever stripped on the 2nd day
3. jumping gears (selector box had to be shimmed)
4. timing at 33 degrees btdc with factory marks aligned, spark knocking. wrong flywheel or wong stator or? had to elongate stator mounting holes to bring timing to 23 degrees
5. now has a horrible internal knock after only 700 miles.

Instagram @dead_vespa_motor
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