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Post by bezzer on Jun 8, 2017 8:22:26 GMT 1
Chaps…Can I ask you what your thoughts are regarding lightened flywheels?, not from a performance view per se, but I remember an article written by KG Draper years ago, that suggested a lightened flywheel on a 2 stroke, was 'easier/less stress' on the crank?. Or do you feel it's overkill?. My bike is a standard 350 4L0, crank will be new with TZ mains, and I just wanted to give it the best chance. I should also say the bike will only be used on the road not track days.
Any thoughts/input appreciated, as ever.
Regards bezzer
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Post by Norbo on Jun 8, 2017 8:35:39 GMT 1
I do it on all my bikes whether they are standard or tuned . i think its the best cheep mod you can do no jetting just better revs , you just need to not take anything of conciquence of the cface of it or they can brake . so just of the outside
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Post by 4l04ever on Jun 8, 2017 8:36:41 GMT 1
Be careful with LC flywheel. :-  I would not machine the face as it will be very weak.... |
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Post by JonW on Jun 8, 2017 13:37:15 GMT 1
How much to take off the outside, 2 or 3mm off the OD?
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Post by mattybeckett on Jun 8, 2017 13:39:06 GMT 1
New flywheels are balanced. So unless you have it balanced afterwards it might do more harm than good.
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Post by 4l04ever on Jun 8, 2017 14:11:24 GMT 1
If you need to save weight on the flywheel, you can get an upgraded smaller flywheel and stator setup...
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Post by reedpete on Jun 8, 2017 16:45:21 GMT 1
Norbo was very gracious to not mention he does them as an exchange item...😀
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Post by JonW on Jun 9, 2017 1:11:40 GMT 1
Hmm, Im wondering if they are they totally balanced within themselves or offset to help with the 'unbalanced crank', and also help keep the engine turning over... If they dont have any offset weight then maybe removing the same amount all over* wont make too much difference perhaps...?
* - of course if you remove some of the material that has the holes in it then you will change the balance of course... maybe this whole post is pointless if there is no way to remove material without doing that. hmm...
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Post by dusty350 on Jun 9, 2017 7:27:44 GMT 1
Hi Iain I had both a lightened rotor and a standard one for my 350lc engine build. I mentioned in a post about using the lightened one, and there wasn't a great deal of positive comments with regards to fitting it. It hadn't had a lot removed - the front face was still original so probably would have been "safe", but in the end I opted for the standard rotor. I don't remember lots of horror stories of Lc's having a weakness in the crank bearings due to the weight of the rotor, and for the amount of miles I'm gonna be doing, the standard bearings will probably outlast my riding future !! When Lc's blow up, it's not because of the standard rotor ! A lightened rotor will spin up more quickly as it has less mass, but when I considered it I thought I may get the same performance results if I ate less pies  Your choice mate  Dusty  |
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Post by bezzer on Jun 9, 2017 8:51:30 GMT 1
Thanks lads, for all your replies and advice, I must concur with Dusty's closing comment - I could definitely do with eating less pies!! .
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Post by dusty350 on Jun 9, 2017 9:37:43 GMT 1
Haha, it's all to do with less mass, and I could certainly shave more than a few ounces off !! Dusty |
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Post by steeley on Jun 9, 2017 12:02:45 GMT 1
Ha , myself I could do with losing 4 stone . ah the joys of beer eh.
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Post by bezzer on Jun 10, 2017 7:11:04 GMT 1
Ha , myself I could do with losing 4 stone . ah the joys of beer eh. Steeley, A life without beer is like a life without 2 strokes!, what is there left?! Lol. |
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Post by Tobyjugs on Jun 10, 2017 11:38:15 GMT 1
I am also looking for a small rotor
I had seen a very nice fly wheel which was small and light
It came from a company Fast From The Past I think this could be American
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Post by bezzer on Jun 10, 2017 12:35:37 GMT 1
Be careful with LC flywheel. :- I would not machine the face as it will be very weak.... Cheers Rob, Exactly the situation I want to avoid!. |
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