What do you think of this frame for an MB?

I am thinking about getting this frameset for my next MB project. It is a Dirt Jumping frame for MTB size wheels (26" aka 559) & looks very heavy duty @ around 6 lbs.
Opinions welcome

 

[lowracer]

Got the engine mounted today.
Here are some new pics of how its coming along.
-lowracer-

 

[iRide Customs]

Wow...that looks like a lot of weight on the front. Why didn't you try to mount it on the back of the bike?

 

[lowracer]

iRide,
I prefer the engine on the front & like the way it handles up front & front wheel drive. Its not that heavy but looks big & bulky. If I took the tank off the top & put it elsewhere it would look better & be only slightly larger than my other MB with the Subaru-Robin up front.
-lowracer-

 

[Wheres my dog]

Safety has always been first for me in every venture I set out on....

That is an awful lot of weight forward of even the center line of the front axle itself... please do a good amount of low speed testing before unleashing the power of the engine!

I might even encourage you to purposely hit some potholes or grooves at low speed to see how it handles!

 

[lowracer]

Wheres my dog,
I've been riding it around unmotored for the past week since the engine was installed. This frame has a rearward weight bias similar to my Rocky Mountain downhill bike & it feels good just riding around under pedal power with the motor up over the front wheel.
It doesnt weigh much more than my Subaru-Robin w/BMP kit although it looks huge.
Don't forget the heaviest part of the MB is me sitting on it (165lbs)...
-lowracer-

 

[lowracer]

She's Alive

Got it mostly done now except still waiting for a Steel Flex Pipe to replace the Silicone tube, some Clamps & Permatex Copper Gasket goo are on the way too. Here are a few pics of the almost finished project. Using Kryptonics 'Kryptos' skateboard wheels to tension & route the v-belt within the engine mount. She hit 53 mph the other day and was fairly stable...lol
-lowracer-

 

[ibdennyak]

Got it mostly done now except still waiting for a Steel Flex Pipe to replace the Silicone tube, some Clamps & Permatex Copper Gasket goo are on the way too. Here are a few pics of the almost finished project. Using Kryptonics 'Kryptos' skateboard wheels to tension & route the v-belt within the engine mount. She hit 53 mph the other day and was fairly stable...lol
-lowracer-

Wow, 53. Your ratio must be about 6-1 I assume? Is your governor disconnected? That's impressive.....mine topped at about 38 with a 9-1. Course it was a lot heavier too.

 

[lowracer]

ibdennyak,
I haven't removed the governor, but I attached one of my daughters rubber band type hair ties to the governor arm & to the engine block to pull the arm when it wants to close the throttle at higher rpm. I really dont have the need to wind this engine up at this gear ratio since I dont ride much @ 50 mph. 40'ish is good enough for me.
The engine pulley is 3.2"
The wheel pulley is 15"
The wheel is 26.5"
Engine max torque @ 3000 rpm's = 50 mph but the engine is rated for 3600 rpm's.
I used a gear ratio calculator building this MB but alot depends on the engines ability to pull the load thru the wind. This Lifan 2.5 is a strong, quiet little bugger.
-lowracer-

 

[4950cycle]

Long time

Low, just checkin out when and the details of your combo and build. I didn't know you did the math on your ratios .

 

[lowracer]

I think I found my gear ratio calculator at the Max Torque clutch website, Here is the link. Just need a tape measure to measure your pulley diameter, sheave diameter, & tire diameter.
http://www.maxtorque.com/html/speed.xls
-lowracer-