Bigbore kits ?
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Road Master
Joined: Nov 2012
Posts: 794
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From: Alvin TX
Bigbore kits ?
I've been reading here & other places about the 85in Big Bore kits ,Even PM'ed a few members here on there builds . So My questions is Has anyone used The HRhm ?? Axell 85 in bolt on Kit ? the kit comes with new Jugs , pistons & wriest pins , comect gaskets , No case boreing needed , Just have to get a head job , I'am the third owner of my 94 softie , seconded owned said he just changed the oil & tires ,I could only find so much on what the first owner did ,Via HD dealer where he bought it & traded it in where second owner bought it , But it had the Red rocker cover gaskets whitch are after market & at a bit over 66k now she stills runs & pulls hard for a stock 80in ,base gasket rear is just weeping , so I plan on taking her apart after Dec , well any ideas or words on the Axell kit
Club Member
Joined: Jun 2007
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From: Bedford UK
Bear in mind that an Evo is actually around 83", the 85" kits are essentially max rebore size, with higher than stock CR. So they don't give much increase in capacity, the main benefit coming from that extra CR.
Take a look at Hillside's website, as I recall them saying they can port heads and supply a kit with modern cam and pistons that give a good performance boost. Years ago I had a stroker kit fitting in my original engine, but Scott from Hillside reckons they can give us similar performance benefits without stroking now.
Take a look at Hillside's website, as I recall them saying they can port heads and supply a kit with modern cam and pistons that give a good performance boost. Years ago I had a stroker kit fitting in my original engine, but Scott from Hillside reckons they can give us similar performance benefits without stroking now.
Last edited by grbrown; Nov 10, 2013 at 04:55 PM.
Road Warrior
Joined: Dec 2012
Posts: 1,690
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From: Lakeville, MN
I ALSO have asked the same question in this forum. From the masses and my mechanic, the general consensus is that there's not much gain for the dollar and you're putting Ol Reliable Evo under stress that it wasn't designed to handle. Im in the middle of head porting and a top end and I asked if I should get the SE high compression pistons since it was apart already and my guy gave me a forceful no. It would be noisy among other things. My 2 cents for what its worth, good luck
Club Member
Joined: Jun 2007
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From: Bedford UK
With 66k on the clock there is a risk that significantly beefing up top end performance will knock out the bottom end in no time!
When I had my stroker kit installed the builder told me he didn't include servicing the rod bearings, as they differ greatly between bikes. Having dismantled my crank he measured up and found both rod bearings out of round, so honed them and fitted over-size rollers. Smooth as silk after that!
When I had my stroker kit installed the builder told me he didn't include servicing the rod bearings, as they differ greatly between bikes. Having dismantled my crank he measured up and found both rod bearings out of round, so honed them and fitted over-size rollers. Smooth as silk after that!
Last edited by grbrown; Nov 10, 2013 at 05:50 PM.
Seasoned HDF Member
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From: Coromandel Peninsula New Zealand
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Cruiser
Joined: Jul 2012
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From: linden, pa
so basically what you all are saying is that the best bet is to put in a cam and a little head work. then leave it at that if you want reliable performance.
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Road Captain
Joined: Aug 2012
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From: New Albany, Ms.
Good exhaust
Ride Safe,
Harold
Club Member
Joined: Jun 2007
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From: Bedford UK
Yes, but do that as a known package, with porting, CR and cam all matched, with exhaust, hence my earlier suggestion to contact a tuning shop like Hillside. You may have one close by who can advise you and do what needs to be done.