Rear Crank Timing out 2.5 Degrees

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SimonLC · #1 Post by **SimonLC** » Thu Dec 31, 2020 5:57 pm

I have just recently found out after doing balancer shaft mod that every single RD500LC produced had the upper crank timing slightly out by 2.5 degrees. This can be rectified by fitting a offset keyway. Anybody else heard about this?

ns86 · #2 Post by **ns86** » Thu Dec 31, 2020 5:59 pm

Well known fact. A member did sell offset keys in the past.

SimonLC · #3 Post by **SimonLC** » Thu Dec 31, 2020 6:16 pm

Any idea who?

silverstrom · #4 Post by **silverstrom** » Thu Dec 31, 2020 9:35 pm

Is was Johnny C.

Username peddrotzr

viewtopic.php?f=3&t=15816

I bought some from him for engines here.

busa1300 · #5 Post by **busa1300** » Sat Jan 02, 2021 2:47 am

You can adjust timing between cranks with the Zeel ignition.

WVWRZ500N · #6 Post by **WVWRZ500N** » Tue Jan 05, 2021 1:33 am

busa1300 wrote: ↑Sat Jan 02, 2021 2:47 am You can adjust timing between cranks with the Zeel ignition.

A Zeel can not correct the physical timing problem with the cranks only the time when spark occurs. In any hot rod 500 engine its a good idea to consider correcting it.

vma500 · #7 Post by **vma500** » Wed Jan 06, 2021 4:33 pm

As Bill said , mechanically correction needed !

Vin · #8 Post by **Vin** » Fri Jan 08, 2021 5:14 pm

SimonLC wrote: ↑Thu Dec 31, 2020 6:16 pmAny idea who?

If Johnny can't help you I have a spare. I bought 2 from Johnny but only need 1 now.

Smoker · #9 Post by **Smoker** » Fri Jan 08, 2021 9:57 pm

If there are left-overs- I'd like to have one, too.

peddrotzr · #10 Post by **peddrotzr** » Sat Jan 09, 2021 2:23 pm

Sorry not replied as I have had internet problems this week!

As Bill states plus others, its always better to sort out the mechanical timing.

Yes sure no problem, I can get a few more offset keys made in a week or two.
So could you please send a PM then I can sort a list out of numbers so I can then go the engineers shortly.

Many thanks for that.

Best regards
Johnny C.

BigGuy · #11 Post by **BigGuy** » Sat Jan 09, 2021 11:13 pm

Hi Johnny, if it's an option I would also be interested in one.

Thank you .
Shawn

peddrotzr · #12 Post by **peddrotzr** » Sun Jan 10, 2021 8:07 am

BigGuy wrote: ↑Sat Jan 09, 2021 11:13 pm Hi Johnny, if it's an option I would also be interested in one.

Thank you .
Shawn

No worries
I will add you to the list

Best regards
Johnny C.

Motolli · #13 Post by **Motolli** » Sun Jan 10, 2021 8:58 am

Me too, please
PM sent
Olli

peddrotzr · #14 Post by **peddrotzr** » Sun Jan 10, 2021 9:18 am

Motolli wrote: ↑Sun Jan 10, 2021 8:58 am Me too, please
PM sent
Olli

Thanks for that. I will add your name to the list
I will give a few other people a few days to contact me however by Friday 15th or Monday 18th I will go the the engineers 25 miles away, but hes very very good!
I take a spare rear crank and primary gear so that the keys are all test fitted when being made.

Regarding the offset key
I would advise that everyone check/measure the timing and not just fit the key without checking first.
I have had 4 engines and all were out by 2.5 degrees but I would advise everyone to check their engine first!
I hope that makes sense.

Once I have been to the engineers I will contact everyone to give an up date.
Usually takes a week or two depending on how busy they are.

Many thanks

Best regards
Johnny C

sean7r · #15 Post by **sean7r** » Sun Jan 10, 2021 9:21 am

Hi, can you add my name to your list, I made a key (2.5 degree) but not happy with the result. Pm to follow. Sean

500 Two-Stroke Tech

Rear Crank Timing out 2.5 Degrees

Rear Crank Timing out 2.5 Degrees

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Re: Rear Crank Timing out 2.5 Degrees

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Re: Rear Crank Timing out 2.5 Degrees

Re: Rear Crank Timing out 2.5 Degrees

Re: Rear Crank Timing out 2.5 Degrees

Re: Rear Crank Timing out 2.5 Degrees

Re: Rear Crank Timing out 2.5 Degrees

Re: Rear Crank Timing out 2.5 Degrees

Re: Rear Crank Timing out 2.5 Degrees