Hi Peter,

Yes I also have a 20 inch twin railer here myself and that has the slightly bowed rear rail symptom as well.

Eventually I will pull this one down and do a full rebuild on it and have a new generation Briggs fitted.

Don't be at all surprised that yours has got some stress fractures lurking underneath the paint finish from years of single piston thumping. Those early engines were very poorly balanced and passed all that force into the chassis which is only made up from pressed sheetmetal.

Cheers,
BB.

I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.