So I got one in a trade but I rarely use it after the initial novelty wore off. Mostly because even after a short ride I end up smelling of gas/exhaust. Someone told me its the exhaust valve timing being off and I should wrap the exhaust to help mitigate that? Is that a good idea or what? I don't feel like tearing the engine down to adjust the exhaust valves, I'd rather just trade/sell it.