Makes sense to me, worth a try.

Lisa.._.Zachs front wheel was on the grass,as soon as his back wheel hit the white line the ref should of flagged it up before announcing the result,2 wheels need to be over

Towards the end of my career my mechanic worked for motad making silencers for the motorcycle industry, through getting done over by Norton they were on the brink of going out of business and decided to try make a speedway silencer to save the business, after we tossed about a few ideas about design they wanted a king silencer they could take apart to see what they were doing inside, I got hold of a silencer off a top elite league rider at the time and they cut it apart to find the baffles had been cut out, I don’t know how it was done but they weren’t there and there were no weld repairs on the chrome plating, we got another one to check it and that had baffles in,motad made an exact replica of a king and as much as we tried we couldn’t get the noise under the limit, motad opted for a different design and although they performed well especially on long track they couldn’t break the monopoly of king in speedway and they went out of business 6 months later, 

Where's the sense of fairness in this? https://www.scbgb.co.uk/news.php?extend.260

Well class rose to the top, Tiges didn't have a (none Kings Lynn rider) who could compete with Aces top two.  But Belle Vue riders threw so many points away not committing to the wide line, it was ridiculous, to go fast you can't just touch the wide line you have to go deep into it or not at all.  The choice of guest for Belle Vue was bizarre, why not go with RR?  Blodorn left Holder & Flint in his wake in his second ride then changed his bike for his third ride, why?  The Ipswich throttle monkey judges can shut up.  Kurtz, Fricke & Doyle rode the quickest line all night and won by mile when they hit the front.  But Zischke & Cook won the meeting for Belle Vue but they kept switching lines when they didn't hit the front.

People from Eastbourne have history with exhaust cheating, as back in the mid 70's eagles were at worky, all the team travelling on a bus, was a heated meeting eagles were winning and it kicked off about an exhaust, it had been taken off the bike and thrown over the pit wall, the mechanic burnt his hand, think they got away with it, think Mike Sampson was the rider