I took the trike to a local Honda dealer for a once over, having the brake fluid flushed/replaced and the valve train looked at for adjustment. Engine is just as clean having the same fact. Factory exhaust that has most of the original black paint, no rust/dings and orig. It would be hard to find a dent in the factory skid plate. Frame is solid with no stress cracks and great fact. Has the original hand grips still on the factory bars. Took the original plastic and tires off to store and preserve them. All original plastics, tires, seat, rims, etc. Trike is 30years old and in incredible condition. #20ġ985 350X second owner, clear Washington Title. I have only used at the dunes to roll around a classic after a days ride on other machines. This is for the person who appreciates the barn find and not the bike you want to take to the local mud hole. This is not a have to sell item or fire sale. I'm sure there are a few of these out there but they are not easy to find, especially all original and not in a "Restored" condition. I chose one of the most original out of the lot when he started selling the collection off. I found the trike in California where a collector had an airplane hanger with a dozen of similar ATC's he had been storing for many years. I also have the original owners manual, (book is in incredible condition) with the original 11 piece tool kit, a rare kit to be complete. I had the carb gone through also since it was there. Techs said they didn't have to adjust anything and doubted the engine had more than 40 original hours on it. But anyway.1985 350X second owner, clear Washington Title. How much actual displacement is picked up by a given over bore varies based on bore and stroke dimensions of the given engine. 040" over gets you 40cc of additional displacement. Lots of misconceptions out there about displacement gains from a simple over bore. Just wanted to make sure you understand the difference between boring a cylinder for an oversized piston and an actual big bore kit. Then if you really want to go nuts there are stroker cranks available to increase displacement even more, plus cam, head porting mods and on and on. So in the case of the Powroll 393cc big bore cylinder kit you buy the cylinder kit, then pay the shop to remove your stock sleeve, bore the cylinder for the oversize sleeve (if necessary) then intall the new sleeve and bore it to match the new piston. All of this will add up a bit in labor expenses. In some cases depending on the engine and bore kit the cylinder itself has to be bored to accept the oversize sleeve. The difference is the actual big bore kit that nets you significant displacement gains involves replacing the sleeve with an oversize sleeve and piston. Powroll still offers big bore cylinder sleeve and piston kits along with stroker cranks for the ol' X. So keep that in mind.īig bore kits are a totaly different animal than just a simple over bore for an over size piston. Going with the 12:1 would be even a bit more improvement, BUT that piston will have you in race fuel territory. I think it's a pretty good "bang for your buck" option to coax more power out of an X. My brother has an '86 350x with that piston and when running side by side with his buddy on another 350x with the same exhaust and filter but with a stock piston you can see the machine with the 10.25:1 piston is quicker revving and pulls a bit harder through the gears. So, the 10.25:1 piston would be a noticeable improvement over stock. It's been a while since I have looked at the Honda sevice manual for the 350x but I seem to recall that stock compression was something like 8.5:1. Now, as you can see they offer 2 different compression ratio pistons, 10.25:1 and 12:1. The purpose of oversize pistons such as these is solely to address a cylinder that is worn out of spec. Don't expect big or even noticeable power gains boring.
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