88 stroker
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Joined: Apr 2019
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From: Adams NY
88 stroker
So I have a couple questions.......
1. I know there are stroker kits out for the TC88A engine, but what size kits are there for the early bikes?
2. How much work to the cases needs to be done to fit them, if any?
3. Some of the kits I've seen add height to the engine, what kits will or will not fit in the 2000 dyna platform?
4. I have seen these kits run many different combos with bore and stroke to get the same cubic inch, are there any draw backs to each?
I'm not necessarily looking at doing one anytime soon, but when i have to rebuild the crank, ill be looking into a stroker build and thinking of going much larger.... maybe a 124" setup.
Also with that, a mild built 124 makes much more power than a 88 or any factory bike, what other problems would I run into with that kind of power. I understand the other machine work that would go into the heads and need for a larger carb, but would the transmission handle the power? Clutch?
1. I know there are stroker kits out for the TC88A engine, but what size kits are there for the early bikes?
2. How much work to the cases needs to be done to fit them, if any?
3. Some of the kits I've seen add height to the engine, what kits will or will not fit in the 2000 dyna platform?
4. I have seen these kits run many different combos with bore and stroke to get the same cubic inch, are there any draw backs to each?
I'm not necessarily looking at doing one anytime soon, but when i have to rebuild the crank, ill be looking into a stroker build and thinking of going much larger.... maybe a 124" setup.
Also with that, a mild built 124 makes much more power than a 88 or any factory bike, what other problems would I run into with that kind of power. I understand the other machine work that would go into the heads and need for a larger carb, but would the transmission handle the power? Clutch?
Last edited by Clarkmac1985; Jun 25, 2020 at 10:01 AM.
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Ok, now I'm interested, by Stroker, is it short rods,change crank? a combination of both? i have a 2005 and Im thinking this applies,not much difference to the 2000 platform Im thinking.
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From: Adams NY
I think about the only difference is the bearings. but again I am unsure. I think the older ones like mine have the timkin bearings, the newer ones like yours have a different bearing.
It is changing the stroke that the pistons moves up and down. I actually think that with a longer stroke in these engines you have to run a shorter piston, but again im unsure. I got ahold of darkhorse crank works to see what they could tell me also, since they build stroker cranks in house. once I get a reply from them ill post it up here also.
I know alot of builders on here may chime in too......
It is changing the stroke that the pistons moves up and down. I actually think that with a longer stroke in these engines you have to run a shorter piston, but again im unsure. I got ahold of darkhorse crank works to see what they could tell me also, since they build stroker cranks in house. once I get a reply from them ill post it up here also.
I know alot of builders on here may chime in too......
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From: san antonio
I am not aware of any stroker "kits" but there are a variety of larger displacement configurations available depending on the bore and stroke combination if one wanted to go larger than 100" (for a TC88) which can be achieved with one of the "bolt on" cylinder kits; anything larger will require machine work on the cases and a "stroker" crank.
If planning to build a 124" motor on early stock cases you are looking at 4.125" cylinder bore x 4.62" stroke; no kit, must machine work to bore cases for the larger cylinders and purchase a new OEM crank or better yet, a crank from Darkhorse. By the time you get done with all the other mods like throttle body, clutch, etc., the price tag will approach $6K but YMMV. Both Scott/Hillside and Kirby/VeeTwin Performance build 124" motors on early cases.
If planning to build a 124" motor on early stock cases you are looking at 4.125" cylinder bore x 4.62" stroke; no kit, must machine work to bore cases for the larger cylinders and purchase a new OEM crank or better yet, a crank from Darkhorse. By the time you get done with all the other mods like throttle body, clutch, etc., the price tag will approach $6K but YMMV. Both Scott/Hillside and Kirby/VeeTwin Performance build 124" motors on early cases.
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Joined: Apr 2019
Posts: 61
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From: Adams NY
I am not aware of any stroker "kits" but there are a variety of larger displacement configurations available depending on the bore and stroke combination if one wanted to go larger than 100" (for a TC88) which can be achieved with one of the "bolt on" cylinder kits; anything larger will require machine work on the cases and a "stroker" crank.
If planning to build a 124" motor on early stock cases you are looking at 4.125" cylinder bore x 4.62" stroke; no kit, must machine work to bore cases for the larger cylinders and purchase a new OEM crank or better yet, a crank from Darkhorse. By the time you get done with all the other mods like throttle body, clutch, etc., the price tag will approach $6K but YMMV. Both Scott/Hillside and Kirby/VeeTwin Performance build 124" motors on early cases.
If planning to build a 124" motor on early stock cases you are looking at 4.125" cylinder bore x 4.62" stroke; no kit, must machine work to bore cases for the larger cylinders and purchase a new OEM crank or better yet, a crank from Darkhorse. By the time you get done with all the other mods like throttle body, clutch, etc., the price tag will approach $6K but YMMV. Both Scott/Hillside and Kirby/VeeTwin Performance build 124" motors on early cases.
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From: florida
stock 88 inch motor, 4 inch stroke, bore cylinders alone, 3.875 and you get 95 inch, stock stroke.
bore stock cylinders to 3.875 and install 4.375 stroke crank and get 103 inch.
no cylinder bore, except for piston sizing issues, install 4.375 crank, get 95-96 cid.
bore the cylinders out a bit more than 3.875 with 4.375 crank and you can get 105-107 easy.
Kirby @ VTwin Racing and Scott @ Hillside can help you out all day.
m
bore stock cylinders to 3.875 and install 4.375 stroke crank and get 103 inch.
no cylinder bore, except for piston sizing issues, install 4.375 crank, get 95-96 cid.
bore the cylinders out a bit more than 3.875 with 4.375 crank and you can get 105-107 easy.
Kirby @ VTwin Racing and Scott @ Hillside can help you out all day.
m
