Questions on Stroker Crank? - Honda TRX Forums: Honda TRX 450R Forum
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post #1 of 19 (permalink) Old 09-27-2011, 10:07 PM Thread Starter
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Questions on Stroker Crank?

Alright so my rod bearing went out and i am looking at getting a new crank. So my option is either is a oem crank or +3 stroker crank but my atv is completely stock besides a slip on and uni air filter without a lid. So i was wondering if it would even be worth the stroker crank if i didn't plan on porting and possibly just sticking with the slip on. I would get a hot cam stage 2 but i would not do any head work and possibly a head pipe or a new exhaust. So my question is what i see worthy gains from the stroker crank or should i just put a oem crank in?
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post #2 of 19 (permalink) Old 09-27-2011, 10:21 PM
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More torque...
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post #3 of 19 (permalink) Old 09-27-2011, 10:39 PM
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might as well do put a stroker if your already in there since there about the same price. i would recommend getting it balanced by crankworks too

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post #4 of 19 (permalink) Old 09-27-2011, 10:41 PM
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just what he said''' stroke dat muda
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post #5 of 19 (permalink) Old 09-27-2011, 11:33 PM
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Stick to an OEM crank if its an 06+. Either that or a long rod stroker. HR crank isn't a good idea on the later model engines.

Tim

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14.4:1 98mm CP piston
Dasa custom ported head with Ferrea SS valves
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post #6 of 19 (permalink) Old 09-28-2011, 12:21 AM Thread Starter
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its an 07...could you please explain why it would be a bad idea to stroker a new motor?
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post #7 of 19 (permalink) Old 09-28-2011, 01:04 AM
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I can't tell you exactly why, but it has something to do with the fact that the newer engines are already a pretty short stroke. When you stroke the crank without a longer rod, the arc that the rod travels in creates alot of side pressure on the cylinder, and they tend to break cylinder skirts and other things. A long rod stroker with a taller cylinder alleviates that problem, but its very expensive. Go with a stock crank and either a big bore kit or a higher compression piston if you want more torque. Unless you want to build a timebomb lol.

Tim

07 TRX470ER



14.4:1 98mm CP piston
Dasa custom ported head with Ferrea SS valves
Web 242/921
Web HD dual valve springs/ ti keepers
Dasa 43.25mm FCR
Dasa intake
Dasa Classic Exhaust
JD +2 ST A-arms
Elka Stage 3 Dune Series shocks F/R
QUIKSHRK (OCP) +4 arched ladder swinger w/Derisi link
G Force axle
Pro Taper Contour CR Hi bars
Houser +2 stem
HID headlights
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post #8 of 19 (permalink) Old 09-28-2011, 01:17 AM Thread Starter
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alright i guess ill keep researching it...is a hotrod std crank any good or is oem the best way to go to keep it realible?
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post #9 of 19 (permalink) Old 09-28-2011, 01:23 AM
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The HR cranks are good, but the bearings suck. Use the OEM bearings with those cranks.

Tim

07 TRX470ER



14.4:1 98mm CP piston
Dasa custom ported head with Ferrea SS valves
Web 242/921
Web HD dual valve springs/ ti keepers
Dasa 43.25mm FCR
Dasa intake
Dasa Classic Exhaust
JD +2 ST A-arms
Elka Stage 3 Dune Series shocks F/R
QUIKSHRK (OCP) +4 arched ladder swinger w/Derisi link
G Force axle
Pro Taper Contour CR Hi bars
Houser +2 stem
HID headlights
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post #10 of 19 (permalink) Old 09-28-2011, 01:31 AM Thread Starter
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Alright im supposed to be getting a price quote from the shop friday when i get home and they were giving some high prices on parts so ill have to see what they come up with...definitally want some more power out of it though since its getting torn down to nothing. who makes a good big bore kit that doesn't break the bank?
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post #11 of 19 (permalink) Old 09-28-2011, 01:44 AM
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Cylinder Works makes a decently priced kit, but the piston that comes with them isn't that great. Going with a stock bore Venom pump gas piston, Stage 2 Hotcam, and green wire mod will be less money and will make for a great setup. I guess it all comes down to what you want from the build. A cheap big bore will make a little extra power over a stock engine, but the Venom/HC2 build will run awesome and will respond better to a decent porting job.

Tim

07 TRX470ER



14.4:1 98mm CP piston
Dasa custom ported head with Ferrea SS valves
Web 242/921
Web HD dual valve springs/ ti keepers
Dasa 43.25mm FCR
Dasa intake
Dasa Classic Exhaust
JD +2 ST A-arms
Elka Stage 3 Dune Series shocks F/R
QUIKSHRK (OCP) +4 arched ladder swinger w/Derisi link
G Force axle
Pro Taper Contour CR Hi bars
Houser +2 stem
HID headlights
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post #12 of 19 (permalink) Old 09-28-2011, 02:32 PM Thread Starter
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alright...do any site sponsors have the venom pistons?
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post #13 of 19 (permalink) Old 09-28-2011, 02:46 PM
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Quote:
Originally Posted by white 450er View Post
alright...do any site sponsors have the venom pistons?
Venom does :p

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post #14 of 19 (permalink) Old 09-28-2011, 04:00 PM Thread Starter
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Guess i never really about that lol... Anyone else any takes on the +3 Stroker crank?`
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post #15 of 19 (permalink) Old 09-28-2011, 04:23 PM
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From what I read here on the board go with a stock stroke for a 06+ machine. If ya wanna get a few more hp/tq do it with compression or big bore. And like the others have said oem bearings on which ever crank you get.

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