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APE valves/springs

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I have recently seen these valves and springs offered by a company called big bore thumpers. I want to know if anyone had used these kits on their drz. And how well did they perform

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so APE has a strong reputation ?

YES, absolutely, a trusted supplier of quality parts, and customer service. I have no personal interactive with mechanical services offered. And Big Bore thumpers is a relatively new off shoot of other products they have marketed for years. So my experience is with limited items in the selection available, I have no reason to believe the quality and service I have seen does not extend to everything else they sell.

IOW, It is a company I’d be willing to buy from on a product Id not previously tested, or seen tested by another trusted agent.

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thats great ... they have some products i am very interested in , their products are well priced

Same here, head for my CRF will be from them when time comes.

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They look like pretty good pieces. I've used APE springs in the past with out any issues. I'm getting ready to try a set in the new head I'm doing for my big motor drz. I measured the spring pressure against a used set of stock springs and here's what I got. At 1.200 in. stock 42 lbs. APE 64 lbs. At .800 stock was 112 and APE 158 lbs. Seems a little stiffer than they need to be but the valves ain't gonna float.

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They look like pretty good pieces. I've used APE springs in the past with out any issues. I'm getting ready to try a set in the new head I'm doing for my big motor drz. I measured the spring pressure against a used set of stock springs and here's what I got. At 1.200 in. stock 42 lbs. APE 64 lbs. At .800 stock was 112 and APE 158 lbs. Seems a little stiffer than they need to be but the valves ain't gonna float.

Thanks for that feedback...:bonk:

Mmmmm..Would be interesting what NEW oem springs measure up as...

So are you putting the APE springs in a stroker with +1mm valves?

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Thanks for that feedback...:bonk:

Mmmmm..Would be interesting what NEW oem springs measure up as...

So are you putting the APE springs in a stroker with +1mm valves?

Yep, The old head had 1mm over in. only, New one has 1mm over Ferreas on both sides. If we have a new set of stock springs in stock, I'll test them and post the results.

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