Need a crank ID

**Tue Aug 18, 2015 6:49 am » Post: #1 » Download Post**

I got parts from japan
I brought this crank as a HRC crank it has NF5 rods on it ... (ignore the 3xv sp crank )
Is this a HRC crank ?

**Tue Aug 18, 2015 11:45 am » Post: #2 » Download Post**

Here are more photos

**Wed Aug 19, 2015 12:52 pm » Post: #3 » Download Post**

1989 MC18 HRC crank I'd say.
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If I have to take the carbs off once more...

**Thu Aug 20, 2015 7:00 am » Post: #4 » Download Post**

StephenRC45 wrote:1989 MC18 HRC crank I'd say.

Thanks !

**Sat Aug 22, 2015 3:25 am » Post: #5 » Download Post**

1989 MC18 HRC crank also has 14mm small ends and won't work with normal NSR pistons only NSR F3 pistons which are impossible to find or you can use Early NF5 RS pistons I think the part # is 13100-NF5-710.
I have the same crank in my MC18 but I use F3 cases as well. I use these pistons in my bike with no problems but they are of course single ring style.

**Sat Aug 22, 2015 6:05 am » Post: #6 » Download Post**

will this crank fit into mc21 hrc cases ?

**Sat Aug 22, 2015 9:42 am » Post: #7 » Download Post**

Just measure the diameter of the crank but I thought the 21/28 cases have a smaller crank diameter, I only have MC18 cases so can't really help with that.