if you havnt replaced them yet, go to ace hardware, go to small engine section look for fuel tubing int the correct inner diameter. the best stuff to use is the pee yellow colored stuff. its kinda pricey... i paid like 13 for 7 feet. its oil and fuel resistant and heat resistant up to 350'f.
i used hooby level zip ties from hobby town usa, the ones they use for
nitro powered rc cars the can get up to 300'f and not stretch or warp
trinity makes them... in multiple colors