My 998 has a simplex chain with no tensioner, is this ok?
will it be ok with my now warmed over 998?
also, generall discussion on timing chains, what do people run?
cheers
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| Timing chain's https://ausmini.com/forums/viewtopic.php?f=5&t=27899 |
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| Author: | jbeenz [ Sat Feb 10, 2007 3:41 pm ] |
| Post subject: | Timing chain's |
My 998 has a simplex chain with no tensioner, is this ok? will it be ok with my now warmed over 998?
also, generall discussion on timing chains, what do people run? cheers |
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| Author: | drmini in aust [ Sat Feb 10, 2007 4:11 pm ] |
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For a well tuned motor with modded cam etc, the simplex ones just don't last. 10,000 miles maybe before it rattles... 
I'd throw a duplex set in- even a pair of s/h duplex sprockets and a new chain is way better than a simplex. 
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| Author: | jbeenz [ Sat Feb 10, 2007 4:36 pm ] |
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Thanks doc so thats definatly a "throw away your crappy old chain" 
this could add a good 20% to the cost of my budget 998 to date 
So, ill be ablo to get my valve timing etc all sweet with the duplex yes? no need for verina adjustables? cheers |
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| Author: | WhoDat [ Sat Feb 10, 2007 4:59 pm ] |
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jbeenz wrote: So, ill be ablo to get my valve timing etc all sweet with the duplex yes? no need for verina adjustables?
cheers Sorry incorrect |
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| Author: | jbeenz [ Sat Feb 10, 2007 5:39 pm ] |
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close enough to correct? its only a 998 with a wade 113. |
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| Author: | drmini in aust [ Sat Feb 10, 2007 5:43 pm ] |
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WhoDat wrote: jbeenz wrote: So, ill be ablo to get my valve timing etc all sweet with the duplex yes? no need for verina adjustables? cheers Sorry incorrect No need for vernier adjustables really- if you want to time it properly (not just line the dots up) use offset keys if needed, and see KC's writeup here- http://www.minimania.com/web/SCatagory/ ... ticleV.cfm Or, KC's alternative method- http://www.minimania.com/web/SCatagory/ ... ticleV.cfm Offset keys are available from Minispares UK etc in 1* increments from 1* to 9*. Note that the key is there to line the sprocket and cam up. The drive torque is (should) be taken by the nut torque of 70lb/ft approx, clamping the sprocket onto the cam. It is poor engineering practice to leave the nut looser and rely on the key for power transmission.
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| Author: | jbeenz [ Sun Feb 11, 2007 6:26 am ] |
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drmini in aust wrote: Note that the key is there to line the sprocket and cam up. The drive torque is (should) be taken by the nut torque of 70lb/ft approx, clamping the sprocket onto the cam.
It is poor engineering practice to leave the nut looser and rely on the key for power transmission. especially with double springs i assume. i will try track down a duplex setup, next engine may get vernia gears...if its really lucky
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| Author: | pristic [ Sun Feb 11, 2007 8:07 am ] |
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I used a Rollmaster Duplex kit... probably more than you want to spend, but worth it on my motor. Peter. |
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| Author: | jbeenz [ Sun Feb 11, 2007 9:03 am ] |
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pristic wrote: I used a Rollmaster Duplex kit... probably more than you want to spend, but worth it on my motor.
Peter. i will use somthing more serious on my 1220 motor, but this is a slap-together 998, it owes me $400 so far all inclusive, all i need now is timing chain gear and oil pump
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| Author: | 1018cc [ Sun Feb 11, 2007 5:52 pm ] |
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drmini in aust wrote: Offset keys are available from Minispares UK etc in 1* increments from 1* to 9*.
Hey doc - I've seen a few of your posts with the star to symbolise the degrees symbol. If you would like to know:- if you hold down the "Alt" key and press "2" then "4" then "8" then let go of "Alt" on the number pad it give the little "°" symbol - if you don't care I won't be offended! 
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| Author: | drmini in aust [ Sun Feb 11, 2007 6:59 pm ] |
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1018cc wrote: drmini in aust wrote: Offset keys are available from Minispares UK etc in 1* increments from 1* to 9*. Hey doc - I've seen a few of your posts with the star to symbolise the degrees symbol. If you would like to know:- if you hold down the "Alt" key and press "2" then "4" then "8" then let go of "Alt" on the number pad it give the little "°" symbol - if you don't care I won't be offended! Thanks for that, I know about the £ symbol got that way, I'll add ° to the list. 
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| Author: | Morris 1100 [ Sun Feb 11, 2007 7:14 pm ] |
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Just a few that I have found handy. I have a bit of paper stuck on the wall with these ones..... Alt and 248 = ° Alt and 0176 = ° Alt and 171 = ½ Alt and 172 = ¼ Alt and 0190 = ¾ Alt and 156 = £ Alt and 0128 = € (euro) Alt and 0169 = © Alt and 0153 = ™ Alt and 0174 = ® Alt and 0178 = ² Alt and 0179 = ³ |
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| Author: | Lillee [ Sun Feb 11, 2007 10:07 pm ] |
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If it's a cheap roadie, just change the chain... $10
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| Author: | drmini in aust [ Mon Feb 12, 2007 5:44 am ] |
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Lillee wrote: If it's a cheap roadie, just change the chain... $10
It won't last if it's a later A series one without any rubber rings- my son's new chain rattled after 5000 miles. Replacement simplex chains are all crap these days. Must be made in China or somewhere then put in a UK box.
If an A+ motor with tensioner, it may last better. |
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| Author: | jbeenz [ Mon Feb 12, 2007 6:07 am ] |
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hmm, id love to do the $10 simplex thing, but, i dont really want the rattles, this engine is only cheep because it was so good to start with its not a hyper-motor, just a tidy little 998
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