Back in 1986 i had an AR80, nice bike when 17 years old but needed a bit more go so it was treated to the following. Autisa 93cc barrel and allspeed pipe and K&N filter.
Sadly it was a tad unreliable (but damn quick) and used to detonate badly and overheat big time. The airfilter stopped you riding it in the wet.
Now as for bodges, firstly the kickstart stripped its splines so i inserted needles into the gaps, tightened the pinch bolt and snapped off the excess pins after.
Secondly, i stripped the barrel stud from the crankcase, so to put the barrel and head back on inserted a coach bolt from the top, removed the flywheel and gene, and put a nut on the underside and ground off the excess.
And sadly the worst one was as follows. on the AR the primary drive on the end of the crank was secured by a rubber / metal star type bush. These shattered under the massive HP hike of the said 93cc kit. Anyway i welded the primary gear to end of the crank directly. did the job but sadly you needed to grind away the end of the crank for each rebuild - which was every 1500 miles with the amount of seizures.
I have a good school friend to thank for the above tips, sadly he is no longer with us and some of you may have heard or remember him. His name was ian dugdale from dugdale motors in helsby. He came to my rescue many a time in the van and we took the poorly AR back to the workshop for its welding / bodging.
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