Handlebar help!!

[lewisweaver]

Okay guys for ages i have been wanting to do a handlebar conversion so i can put some downhill bars like:

cgi.ebay.co.uk/TNT-Anodized-Blue-Moped-Handle-Bars-/150552359557?pt=UK_Motorcycle_Parts&hash=item230d9eb285#ht_500wt_1156

On it. But firstly i am going to need to sort a stem out. Now i am wondering if this sort of stem would fit straight in:

cgi.ebay.co.uk/BMX-HANDLEBAR-BAR-4-BOLT-ALLEN-KEY-STEM-/220688243045?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item33620b5965#ht_500wt_922

The bars/stem currently on my moped are joined together with a single tube and expanding end thing, so both will need replacing.

Is there a standard size for these stems or are they all different?
Has anyone ever attempted one of these sort of conversions?

Thanks guys

[davytelford]

i did this conversion on my bandit a while back it was a 400 so i used 600 yokes

maybe this stem would be better
cgi.ebay.co.uk/XPOSURE-BMX-STEM-/250761290248?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item3a6289a208

[lewisweaver]

It wouldn't fit, because there isn't anything for it to mount onto. Idealy i want a cheap stem for like a sh*tty old bike! but preferably with a double bolt so i can fit some big bars on. Cheers for the help anyway

[davytelford]

no worries ill keep looking anyways

[lewisweaver]

Cheers buddy