I'm thinking about pulling the trigger on a big bore for my Tri-Z, the Klemm 350. I was talking with Harry today and he said about 10 people have done it recently. I'm wondering if anyone that has bought the kit can offer feedback on their builds and how thy run. I have other projects and I'm trying to decide whether this is the one to put money on. I'm sure it's a beast and tons of fun. One thing that concerns me is how it revs out. I like engines that rev out quickly--like my Z currently does--rather than chug. I know more reciprocating mass can slow an engine down. I've had a big bore in the past that was disappointing in that department. Also, since Harry doesn't build pipes for them, how does a standard displacement pipe work, e.g., DG, etc? I'm a little worried about overheating being a problem. Anyway, your feedback is appreciated.