Modern Vespa

Can anyone confirm if I should experience a noticable increase in vibration through the frame/headset over a stock P2? I'm using a new 60mm Tameni crank and all new bearings. The vibration is most noticable going up through the rev range. At higher RPM, it seems to smooth out to an acceptable level.

I'm using the base gasket and VRH head supplied with the kit, admittedly bolt on at this stage. Is the compression typically high with the Pinasco setup, and could this be responsible for the vibration? Is the vibration just normal for this type of ride? My engine and suspension mounts are new and upgraded.

Cheers

yeah mines vibrates more too.

What run out measurement did you get on the crank before you installed it?

Hello seigiorni I didn't get it checked. Just installed it out of the box. Are there any tell tale signs or tests that I can do to check the crank with a fully built and running engine?

The problem is that I have never experienced anything other than low power stock Vespas (150 Super and PX150). I'm just wasn't sure what to expect with the Pinasco 225/long stroke setup. For all I know, the vibration level is perfectly normal for a motor with a bit more power (15-18 is typical for the Pinasco setup from what I read).

You just assumed it was true out of the box?

One of the tell tale signs are vibration.

seigiorni Yes, I did, having spent quite a lot of money on a reputable brand. Is it typical for brand new cranks to need checking and possibly rebalancing? If it is, I'll buy second hand in future and save some cash

You didnt really answer his question aye


@ swa45,
Dont freak out, you can get a DTI onto the flywheel taper once the flywheel is removed. Put the nut on the flywheel and turn the crank by hand slowly with a spanner. that should give you an indication of the runout, 1 thou is ok more is not so hot. You can search for how to do this on you tube if my description isnt clear. Its not exactly using a crank run out tool but itll give you piece of mind for what you want