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Ag175???

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Ag175??? was created by Izaac

Hi all Iv just bought an Australian ag175 about 1975 interesting thing is it has reed valve and a DT style expansion chamber (not like ct1) and 6 head bolts. Anyone know what is going on here and how much HP it should make and if I can get more from it?
20 Sep 2021 20:39 #1

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Replied by RT325 on topic Ag175???

Sounds like you have a later grasshopper agy but i thought they started nearer "80. Does it look like this. If so it's still a de-tuned version of a DT175 of similar cylinder design. Quite grunty & excellent farm bike but will lack the outright top end of the trail cylinder. Here's a link to the parts diagrams that you can change along the top. Far later model but is one of those models that never changed from the first grasshopper as far as i know, or no major changes. www.firstclassmotorcycles.com.au/partFin...175/cylinder#content

 
Last edit: 20 Sep 2021 22:37 by RT325.
20 Sep 2021 22:23 #2

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Replied by Izaac on topic Ag175???

Yeah that's probably what it is. So are you saying a dt175 barrel will get a bit more top end? Do these Ag "grasshopper" have much of a power band? Would a dt175 barrel give one? Sorry for lots of questions
 
21 Sep 2021 17:34 #3

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Replied by RT325 on topic Ag175???

I'm no help as not done the swap but need to find a wrecker & compare cylinder for porting differences between the two. Looking on partzilla at the base gasket the numbers are different but the shape for fitting the studs is the same. Hope someone from oz comes on that's up on the play doing that sort of thing. So far as a true powerband goes you're never going to get that with an Ag or a DT175 without serious porting & a race chamber.
21 Sep 2021 17:52 #4

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Replied by MarkT on topic Ag175???

If you buy a new powerband get a blue one. They are better than the other colors. 

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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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21 Sep 2021 17:56 #5

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Replied by Schu on topic Ag175???

 

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Schu

CT175B, CT175C, JT1' JT2' DT360A, GT80B, DT100B, DT125B,
DT175B, DT175C, DT250B, DT400B, Z50, SCR950

Someday, you'll own some Yamahas
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Last edit: 22 Sep 2021 16:41 by Schu.
22 Sep 2021 14:38 #6

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Replied by RT325 on topic Ag175???

Don't take offence being ribbed about 'power band'. Sounds like you're reasonably young but hey we're here to help. If ya 'really' want to try a power band try my old over-modified 360, it's just un-rideable so i must tame it down--scares me.
23 Sep 2021 15:28 #7

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Replied by Izaac on topic Ag175???

Yeah no problem I'm fairly young. Just want to have some fun riding in the bush. A little "burst" of power would  add to the fun. But nothing crazy as it will be used for Ag farm use as well thanks all for the information
 
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23 Sep 2021 17:43 #8

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Replied by MarkT on topic Ag175???

Interesting that it has 6 head bolts...  can you tell if it has 4 studs holding the cylinder?  A DT175 cylinder may fit and would probably boost the power some.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
23 Sep 2021 17:58 #9

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Replied by RT325 on topic Ag175???

MX175 top end might fit but not sure how much better it is than a DT175 as MX in those sort of bikes, DT etc, doesn't mean much more than the trail bike minus lights & not a fire breathing motocrosser.
23 Sep 2021 19:58 #10

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