on going build 81 sr

Pancake808 · Post by **Pancake808** » Sun Sep 19, 2010 6:18 am

Can dio parts fit on the express sr engine??? Mostly the manifold?? Gears?? Ect??? I have a 81 express sr which I'm building. Not a novice mechanic just started on mopeds. Also where do u get those one piece aluminum solid spree rims??

Trafficjamz · Post by **Trafficjamz** » Sun Sep 19, 2010 10:24 pm

Pancake808 wrote:Can dio parts fit on the express sr engine??? Mostly the manifold?? Gears?? Ect??? I have a 81 express sr which I'm building. Not a novice mechanic just started on mopeds. Also where do u get those one piece aluminum solid spree rims??

I don't think the two engines share any parts. Head gasket maybe?

Is the eXpress SR a variated Engine?

Dude Swap in a dio!

Pancake808 · Post by **Pancake808** » Mon Sep 20, 2010 6:37 am

Yes... I got a 70cc polini kit, spree head for higher comprression, currently making a 22mm carb setup and a ev exhaust.

ottoman · Post by **ottoman** » Mon Sep 20, 2010 2:36 pm

Pancake808 wrote:Yes... I got a 70cc polini kit, spree head for higher comprression, currently making a 22mm carb setup and a ev exhaust.

Spree head doesn't cool as well its designed to work with a fan and shroud.
Your better off milling the stock head for more compression or better yet using a Hobbit or Derbi head.
The Derbi has a slightly different bolt spacing but its easy to mod to work... I did 3 of these heads for guys and its the best cooling head option for the express/hobbit.

ottoman · Post by **ottoman** » Mon Sep 20, 2010 2:39 pm

heres a crappy pic of one of my Express's with the Derbi head

Trafficjamz · Post by **Trafficjamz** » Mon Sep 20, 2010 2:45 pm

Very cool

Where did you get the front forks from?

Pancake808 · Post by **Pancake808** » Mon Sep 20, 2010 2:50 pm

Could u make one for me??? Let me know the price ! I will use paypal.

ottoman · Post by **ottoman** » Tue Sep 21, 2010 1:40 am

Trafficjamz wrote:Very cool

Where did you get the front forks from?

That the stock Urban Express front end with the bars cut way down.... just a lot of express odds and ends tossed together

I really like your Express/dio build... looks like something that would come out of my shop

ottoman · Post by **ottoman** » Tue Sep 21, 2010 1:44 am

Pancake808 wrote:Could u make one for me??? Let me know the price ! I will use paypal.

This is the Head I use if your running the 70cc kit...
http://www.treatland.tv/derbi-metrakit- ... c-head.htm
Looks like they are out of stock right now... email Benji and see if he can get you one.
I just put it in the mill and very slightly move the mounting holes to fit the Honda pattern... would do it for the cost of shipping.. not a big deal at all

elitedio · Post by **elitedio** » Tue Sep 21, 2010 9:16 am

Both are nice conversions! I especially like the bobber/cafe look.

Pancake808 · Post by **Pancake808** » Wed Sep 22, 2010 7:28 pm

My pics won't post????

Pancake808 · Post by **Pancake808** » Thu Sep 23, 2010 2:58 pm

what do u think?? i still got more work to do on it.

Pancake808 · Post by **Pancake808** » Thu Sep 23, 2010 3:05 pm

Pancake808 wrote:what do u think?? i still got more work to do on it.

i got the polini cylinder in, almost done with the 22mm lifan carb/ manifold welded up. got the reed upgrade and ev exhaust.

i was gonna put lighter weights in the variator and a wider belt??? or can any other variator fit thats larger??? or can anyone show me the proper variator mod!!! there are so many diffrent ways?? some look to be wrong!!! also anything else that will help with over all engine performance that i might have missed.

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