Honda CB750 Cafe Racer Blocked Pilot Jets Issue & Oil Leak Fix | One Step Closer to the Road | 37

Honda CB750 Cafe Racer Blocked Pilot Jets Issue & Oil Leak Fix | One Step Closer to the Road | 37 In this episode I’m back working on my Honda CB750 café racer project, a bike that was originally bought for its parts before gradually turning into a complete build in its own right. If you’ve followed the playlist from the beginning, you’ll know this machine has been through quite a journey already, including an 823cc Yoshimura big bore conversion, a mixture of components from different CB750 models, and a full engine rebuild. #ad Here's what we used in this video (affiliate links). As an eBay Partner Network affiliate and Amazon Associate, we earn commissions from qualifying purchases: Carb Synchronizer: https://ebay.us/WjI2fR Teng Tools Torque Wrench 70nm - 350nm: https://ebay.us/9G1fO1 Teng Tools Torque Wrench 20nm - 100nm: https://ebay.us/rmFMqA Teng Tools Torque Wrench 5nm - 25nm: https://ebay.us/m6vVsK Thanks for supporting the channel! The bike has been sitting for quite some time, so before I can think about getting out on the road I want to tackle a few jobs that were highlighted during the previous video. The plan is straightforward enough: remove and inspect the carburettors, clean the pilot jets and float bowls, change the oil, investigate an oil leak on the stator side cover and finally fit a missing washer in the starter mechanism that several eagle-eyed viewers spotted in the comments. As is often the case with old motorcycles, one simple job quickly leads to another. Once the seat and tank are removed, the carburettors come off for inspection. Considering they have been sitting with E5 fuel in them for the best part of two years, they are actually in surprisingly good condition. However, a closer look reveals that several of the pilot jets are partially or completely blocked, which could explain why the bike has been reluctant to run properly on all four cylinders at idle. The carbs receive a thorough clean, with the pilot circuits carefully cleared, passages blown through and float heights checked before everything is reassembled and fitted back onto the bike. Along the way I also deal with a little surface corrosion, tidy a few details and try to give the machine the best chance possible of running cleanly again. With the carburettors back in place, fresh fuel added and the battery connected, it’s time to see whether the work has paid off. The CB750 fires up and runs, but not everything is quite perfect yet. Temperature checks on the exhaust headers show that two cylinders are still running cooler than the others at idle, suggesting there is still more investigation required. At higher revs they join in properly, which points towards a fuelling or carburettor synchronisation issue rather than anything more serious. The next task is an oil change and inspection. Given that the engine was rebuilt not too long ago, I want to make sure there are no unpleasant surprises hiding in the oil. Thankfully everything looks clean, with no signs of metallic debris or anything else that would cause concern. While I’m there, I remove the stator cover, fit the missing starter washer, replace the gasket and eliminate a small oil leak that had developed on that side of the engine. After reassembly, fresh oil is added and the fuel lines are rerouted in an attempt to improve fuel delivery to the cylinders that seem to be struggling. The following day I fire the bike up again and carry out another round of checks. The results are encouraging, although there is still a noticeable temperature difference between the cylinders when the bike is idling. Unfortunately time and traffic get the better of me before I can take the CB750 out for a proper test ride. Living in a busy seaside town means project bike road tests are best left for quieter moments. Before the next ride I’ll probably balance the carburettors, fit some bar-end mirrors and continue chasing the final few issues that stand between this bike and regular road use. If you’ve got experience with classic Honda fours and have any thoughts on the remaining idle issue, feel free to leave a comment. As always, thanks for watching, and if you’d like to see how this CB750 project develops from here, make sure you subscribe and follow the build series. For more helpful how-to guides and restoration project logs, visit our blog: https://www.spannerrash.com/