How are u704 engines restricted

[Rsk_141]

Was wondering how u704 engines restricted?

 

[Ben Slabby]

U704... France /Germany? I had one with a U704 prefix and was told head and cams. Whether this was right, I never fully found out. Not much help, sorry.  From memory, it was @Del who mentioned it. There's not much he doesn't know about oilboiler lumps.

Edited June 22, 2016 by Ben Slabby

[Rsk_141]

Thanks, 

 

[FJD]

this should be the GU74C 1052 lump then.

The engine itself should be the same ereywhere, restrictions could be in carb tops (slides don´t go up all the way), carb jetting, inlet rubber reduction, or exhaust reduction.

just check these points to find out

[Rsk_141]

3 hours ago, FJD said:

this should be the GU74C 1052 lump then.

The engine itself should be the same ereywhere, restrictions could be in carb tops (slides don´t go up all the way), carb jetting, inlet rubber reduction, or exhaust reduction.

just check these points to find out

GU74B, tin top carb caps, can push slides all the way up, jetting checked against book on rebuild all ok, carb rubbers flush with inlet castings, cobra exhaust fitted,

Cool, so we have full power Cap'n.

[FJD]

Have fun hooning around !

[Rsk_141]

4 hours ago, FJD said:

Thanks for the info.

G.

Edited June 23, 2016 by Rsk_141

[kokolis]

I bought a german slabby back in 88 for parts, different pistons and a tooth less on the crank.

[Rsk_141]

Just had DVLA on the phone saying, because of recent events my bike could be deported for being a toothless crank,  

Edited June 25, 2016 by Rsk_141