Scooterotica

I have nearly finished the porting on my St4 200 Iron barrel that is to be fitted with an Atomic small reedvalve and 28mm PHBH with an Adj power jet and modified Mahle piston.
Previous to this the engine was run as a stock Indian barrel with Mahle piston and the 28mm (non PJ) jetted as follows - X13 needle (top clip), MJ 105, P 56, AV264, 300 Float valve and air bellows with foam filter, exhaust is a Taffy Copy.
I hope to have this finished and in the scooter this weekend and so far have upjetted the Mj to 120 in preparation for starting and running in (new rings fitted). Does this sound about right to start with or do I need a bigger MJ (power Jet is closed at Moment).

Any advice greater appreciated as nearest dyno is 25 miles away and i do want to get there!! Andy

cast 205 bore up til last year, not anymore but I still have the settings.

With large reed block & 28mm delly & Taffy copy

Main 118
av266 atomiser
55 pilot
x2 needle 2nd clip

As dynoed at Puzzle scooters, which is no more.

That's where mine was set up as well, will be looking at Pro-Design in Littlehampton in future. If weather is good I may ride down at weekend for a chat with them. cheers I will try those settings once it's in and running. Andy

Running exact same spec and pipe.x13 needle 2nd clip i think.125 main.generally use slightly bigger main jet with a reed.28 dellorto

anyone running a 30mm Amal on a 200 Atomic/LTH reed-valve setup?
& what jets are you using if so??
i`ll probably end up going for a PHBH Dellorto later, as me spendings are getting outta hand at min... lol

anyone ??