jonniebick
Drag-strip hero
Nice Bike...How fast duz it goo mister????
Posts: 246
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Post by jonniebick on Nov 1, 2011 22:45:24 GMT 1
I'm looking for some info,
I looking to build a stroker engine. Can anyone give me info on what to buy and who from??
I'm looking to use original 1ua barrels with a coolhead.. I quite like the look of those cross over inlet manifolds too....
what length rod gives what c.c.
How much tuning should I get??
The bikes not for racing, just thrashing!!!
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Post by JonW on Nov 1, 2011 23:17:37 GMT 1
Almost anyone who builds cranks can make you a stroker crank, but you can buy them ready done from Norbo i expect. I got mine from TSS, (who now say that the balancing is fine by the way!) but many of the Banshee guys also sell them. you can go +4, +7 and even +10 all with varying amounts of work on the cases. you can get rods in 110 and 115 length for stroker cranks as well.
Coolhead... hmmm... check out Wicked's YPVS billet head... much the same money and much much sexier. Runs nice and cool according to my mate locally who runs one on his bike.
X-over Inlet I bought from Wicked when I was there, get it matched to to vforce3's as well for good induction.
You could port after that.... but you need to work out what you want torque and power wise really. Riding in traffic with ports for race would be mental. (fun for 10mins tho LOL)
As for sizes of cc's... you need to use a formula to work that out based on the extra length of the stroke using your rebored cyls as the bore.
...standard numbers people see are round 385cc with standard cyls, but depends on bore.
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jonniebick
Drag-strip hero
Nice Bike...How fast duz it goo mister????
Posts: 246
|
Post by jonniebick on Nov 2, 2011 0:04:29 GMT 1
Cheers bud.
After looking at the wicked site,, I'm thinking of buying one of their 421 big bore kits...
Worked out the exchange rate and its not bad at all... works out around £700.00..
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Post by JonW on Nov 2, 2011 0:42:08 GMT 1
No worries, I came to the same conclusion hence my 421 build thread LOL
When you speak to Roger @ Wicked, tell him i say 'hi', that will amuse him.
Oh and do pay the extra $40 to have the Athena kit fettled and cleaned up, see my build thread, its well worth it.
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Post by scott on Nov 2, 2011 23:26:36 GMT 1
Did you say you wanted to build a stonker  Viagra mate ;D ;D ;D ;D |
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Post by midlifecrisisrd on Nov 3, 2011 9:23:48 GMT 1
Doing one right now in 385 ypvs thread. Got 1ua cylinders on 65mm and +4mm crank giving 385cc. You can use the shorter rod but the 115mm one reduces the side thrust on the piston/bore so will last longer. You can use a spacer under the barrels to take up the extra rod and stroke but I'm not. I'm using wiseco 795 forged pistons as the pin position is 5mm higher and the head has been re cut to allow for the extra travel. When you first look it seems cheap but everything soon mounts up. I've went down the route of not using my old engine ( always good to have a spare ) and building a complete one from scratch using as many new and upgraded parts as possible. By the time the motor is finished and then pipes, carbs, rad, and all the little bits your looking at about £2.5k If you go the 1UA route you can use your pipes and carbs and upgrade as money allows. That's why I didn't go the athena route as the rest was not interchangeable and if you wreck a bore it's just a case of picking up a barrell and getting it port matched, a lot cheaper than a new block and porting again. Also didn't want to lose the pv's and the standard motor look. Steve |
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Post by JonW on Nov 3, 2011 11:28:23 GMT 1
Depends which pipes you buy, my pipes for my Athena build came with flanges that slide into the bosses. That means they work for either banshee or RD/RZs, clever stuff i thought. I agree the spacer plate is a dogs breakfast, it seems to wake the bikes up to run 795s and no spacer if using the std cyls. I run 573s with no spacer on my athena. carbs and rad etc are the same with the athena, so not sure what you mean there Steve. And you can get new barrels as needed of course, not sure what a new block means. lack of PVs and std look, yep youre right about that of course  I have a set of 1UAs for my next build but i may do another athena if i like riding the one im building now, we'll see. its nice to have options. Also agree, non if this is 'cheap', but it is value for money once its done as you have a new engine etc. |
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Post by smads on Nov 3, 2011 19:21:53 GMT 1
jonw,,,i ran my engine today with tss crank...smooth as silk :-)
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Post by midlifecrisisrd on Nov 3, 2011 19:35:17 GMT 1
Depends which pipes you buy, my pipes for my Athena build came with flanges that slide into the bosses. That means they work for either banshee or RD/RZs, clever stuff i thought. carbs and rad etc are the same with the athena, so not sure what you mean there Steve. And you can get new barrels as needed of course, not sure what a new block means. Also agree, non if this is 'cheap', but it is value for money once its done as you have a new engine etc. Didn't realise your pipes came like that, good idea. Was always going to get kenny to do the pipes for mine matched to the motor. Called the barrells a block as I was thinking of the one piece style like the banshee rather than seperate barrells. Also didn't think you could use the standard carbs on it as thought they would be a little small for the 421, same as you could probably get away with the standard rad on the 385. It is expensive but worth every penny. Steve |
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Post by JonW on Nov 3, 2011 22:42:05 GMT 1
smads, thats great news, and thanks for letting me know, Im really pleased your engine is running well mate, I was gutted for you when I saw the news the past few weeks.
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Post by JonW on Nov 3, 2011 22:50:52 GMT 1
Called the barrells a block as I was thinking of the one piece style like the banshee rather than seperate barrells. Also didn't think you could use the standard carbs on it as thought they would be a little small for the 421, same as you could probably get away with the standard rad on the 385. It is expensive but worth every penny. Steve LOL, see my thread when you get half an hour to yourself (its a bit 'lengthly' LOL), i show the cyls. They are separate units, they are externally copies of the banshee. Weeeellll... you can use all the standard stuff, but to get the best out of it you would need to go bigger of course. Wicked tested and dyno'd a 421 Athena in this thread, with video, all on std carbs and rad: www.rzrd500.com/phpBB2/viewtopic.php?t=6544&postdays=0&postorder=asc&start=30I cant wait to run my engine, will be in another month at least tho, ive a bunch of jobs yet to do on it plus im saving for my carbs  |
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Post by JonW on Nov 4, 2011 6:06:04 GMT 1
Depends which pipes you buy, my pipes for my Athena build came with flanges that slide into the bosses. That means they work for either banshee or RD/RZs, clever stuff i thought. Didn't realise your pipes came like that, good idea. Found a pic online of my pipes shows the separate flanges whilst looking for something else and thought of you:  I wish all the exhaust people did their pipes this way, its so much simpler if you later want to change engines around etc. Pipes arent cheap enough to buy multiple sets of |
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Post by midlifecrisisrd on Nov 4, 2011 9:30:45 GMT 1
Called the barrells a block as I was thinking of the one piece style like the banshee rather than seperate barrells. Also didn't think you could use the standard carbs on it as thought they would be a little small for the 421, same as you could probably get away with the standard rad on the 385. It is expensive but worth every penny. Steve LOL, see my thread when you get half an hour to yourself (its a bit 'lengthly' LOL), i show the cyls. They are separate units, they are externally copies of the banshee. Weeeellll... you can use all the standard stuff, but to get the best out of it you would need to go bigger of course. Wicked tested and dyno'd a 421 Athena in this thread, with video, all on std carbs and rad: www.rzrd500.com/phpBB2/viewtopic.php?t=6544&postdays=0&postorder=asc&start=30I cant wait to run my engine, will be in another month at least tho, ive a bunch of jobs yet to do on it plus im saving for my carbs Have read through your thread before and can't wait to see it finished, will be awesome. It's impressive the results with the stock stuff, had heard the carbs were good for 70+ horses but opted for the pwk's for better mid and easier jetting. Just got mixed up with your barrells. Steve |
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Post by JonW on Nov 4, 2011 9:43:43 GMT 1
Thanks mate, i do hope so. you can never quite tell til things are done, but all indications are it should be a rip snorter LOL I was going to run the PWK28s i have but was advised i was selling the engine short with them and that PJ34s were the go, seems they jet easier than the similar sized PWKs which would be cool. In that vid i reckon you can hear the stumble at 4kish on the runs, amazing how that is shown on the plots. Sadly that bike wasnt there when i visited Wickeds place or id have given it a spin up the road. The area where their shop is based is pretty quiet tho there are a lot of bodyshops there so a lot of testing of vehicles going on   |
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